In this Instructable, I will be guiding you step-by-step to make this Castle in the Sky using Tinkercad software. Tinkercad is a beginner level CAD software that is accessed completely online, so there is no need to download anything. I myself was brand new to Tinkercad when I started this project a few weeks ago, so although this is very detailed, it is not very difficult to execute.

Once you are done with the model, you can keep it as is or choose to 3D print it. I will not be printing this, but if you have a 3D printer at home or are able to access one through a community center, then please do so!

Have fun!

Note: If you are ever confused with the instructions, check the pictures. Each step has a picture that correlates to it. For example, in "Step 1," there are 3 steps and 3 photos. Step 1 corresponds to the first photo, step 2 corresponds to the second photo, and so on. This is the case for every step.

Supplies

- Computer

- Tinkercad account (it's free to use!)

Step 1: Getting Started

1. Go to tinkercad.com, and log in to or create an account. Once you do, you should automatically be taken to the Dashboard. Click 'Create new design', and you will be taken to a new workplane.

2. Let's go over the basic tools and functions of the workplane. Take a look at the second photo for reference.

A. This is the name of your design. You can rename it by clicking on the name and typing a new one in.
B. This is a toolbar that contains features such as copy, paste, duplicate, and delete. The functions I find most useful in this tool bar are the undo and redo button.
C. This is the view square, which allows you to change the angle at which you are looking at your design.
D. This is another tool bar that allows you to bring the angle back to home view, zoom in and out, and switch to orthographic view.
E. The blue grid is called the workplane.
F. This is the final tool bar that allows you to group, ungroup, align, and mirror items.
G. This is the panel that contains the basic model you will use as the building blocks of every design.

3. Rename your design to "Castle in the Sky". This way, you'll know what the file is without having to open it if you ever return to it in the future.

Note: Here is a link to a cheat sheet of keyboard shortcuts that will make designing on Tinkercad easier.

Step 2: Main Castle Body (Part 1)

1. From the panel, click on the 'Box' model and drop it in your workplane.

2. When the box model is selected, a 'Shape' menu will pop up. Click on the 'Solid' button, and a menu of colors will open up. Switch the color menu from 'Presets' to 'Custom'. In the 'Hex #' box, copy and paste f5e8d7 and hit the 'enter' key. This will be the color used for the body of the castle.

3. When you select the box model, another function that shows up are arrows and black and white squares. The rounded arrows allow you to rotate the model, while the cone-shaped arrow at the top of the model allows you to change the vertical location of the model. The white and black squares allow you to change the length, width, and height of the model.

4. Click on one of the white squares in the bottom corner of the box model. When you do this, the length and width of the model shows up. By default, it is 20x20 units. Change it to 40x20 units either by dragging the square or typing the values in.

5. Click on the white square that shows up on the top of the box model. When you do this, the height of the model shows up, which is 20 units by default. Change it to 60 units so that the dimensions of the box are 40x20x60 units.

Step 3: Main Castle Body (Part 2)

In this part, we will make a model for the window.

1. Place a 'Box' model and make the dimensions 5x5x5 units.

2. Place a 'Cylinder' model, which can be found directly next to the 'Box' model in the panel. Make the dimensions 5x5x5 units as well.

3. Rotate the cylinder 90 degrees by clicking one of the top rounded arrows.

4. Raise the cylinder up by 2.5 units by clicking on the cone-shaped arrow on top of the model.

5. Move the cylinder on top of the cube, as shown in the fifth photo.

6. Group the two models together by clicking and dragging over the two shapes and clicking the 'Group' button in the top right toolbar. This will combine the two models into one, making them the same color.

7. Make the model a hole by clicking on the 'Hole' button that shows up on the 'Shape' menu.

Note: Make sure to keep at least one copy of each model you make because it might be used in future sections of the project.

Step 4: Main Castle Body (Part 3)

1. Copy and paste the window model twice and make them 40 units long.

2. Raise the windows up by 3.75 units. Place them in the center of the box model, two units apart from each other, as the second photo shows.

3. Repeat the previous step but at 18.75, 33.75, and 48.75 units tall.

4. Select the box and windows and group them together. This creates windows in the box.

5. Copy and paste the model four times and line them up together, as shown in the fifth photo. Later on, when we group the models together, the lines in between them will be gone.

Step 5: Main Castle Body (Part 4)

1. Copy and paste four more window models. Make them 100 units long and raise them by 3.75 units. Take two sets of two windows that are 2 units apart and set them 8 units apart in the castle body. Check the first photo for clarity.

2. Repeat the previous step at 18.75, 33.75, and 48.75 units tall. Group the windows and box models together. Remember to save a box model without grouping it to anything.

3. Place a 'Box' model and change it to the body color. Change the dimensions to be 96x36x60 units. Place the box centered inside the castle body so that rather than being completely cut out, the windows are inset by two units. Group them together.

Step 6: Main Castle Body (Part 5)

1. Place a 'Roof' model. Make the dimensions 40x100x30 units. Change the color to be 2b276e. This will be the color of the roof

2. Place a second 'Roof' model. Make the dimensions 36x100x27 units. Copy and paste to make two if them.

3. Make one of the the smaller roof models a hole. Place it in the center of the larger roof model and group them together.

4. Change the color of the smaller roof model to the body color. Copy and paste two window models and make them 100 units long. Raise them by 3.75 units. Place them 2 units apart in the center of the roof model. Group them together.

5. Place a new 'Roof' model change it to the body color. Make the dimensions 36*96*27 units. Place it inside the roof model and group them together so that the windows are inset by two units.

6. Raise the roof model by 60 units and place it on top of the castle body. Raise the blue roof model by 60 units and place it on top of the first roof.

Step 7: Main Castle Body (Part 6)

1. Place a 'Cylinder' model and make the dimension 15x15x75 units. Change it to the body color.

2. Copy and paste a few window models and make them 15 units long. Place the windows in the center of the cylinder at the heights 3.75, 18.75, 33.75, 48.75, and 63.75. Group the cylinder and windows together.

3. Place another 'Cylinder' model and make it 13x13x75 units. Change it to the body color. Place it in the center of the first cylinder and group them together. This is the base of the tower.

4. Place a new 'Cylinder' model and make it 17x17x2 units. Place a 'Cone' model and make it 17x17x17 units. Raise the cone by 2 units, place it on top of the cylinder and group them together. Change it to the body color.

5. Rotate the cone and cylinder model upside down. Raise it by 60 units and place it on the tower.

6. Place a new 'Cylinder model and make it 15x15x15 units. Change it to the body color.

7. Copy and paste four more window models and raise them to 3.75 units. Make the windows 17 units long. Place them in the cylinder at 0, 45, 90, and 135 degrees. Make sure the windows go all the way through the cylinder. Group the cylinder and windows together.

8. Place a new 'Cylinder' model and make it 13x13x15 units. Change it to the body color and place it in the center of the other cylinder model. Group them together so that the windows are inset by 2 units.

9. Raise the cylinder model by 79 units and place it on the tower.

10. Copy and paste the cone and cylinder model and flip it right side up. Raise it by 94 units and place it on top of the tower.

11. Ungroup the top cone and cylinder model. Change the cylinder to the body color. Change the cone to the roof color. Change the height of the cone to 30 units.

12. Select the whole tower and place it on the side of the castle body, as it is in the twelfth photo.

Step 8: Main Castle Body (Part 7)

1. Place a 'Cylinder' model and make it 30x30x105 units.

2. Copy and paste a couple of window models and make them 30 units long. Place them in the center of the cylinder at the heights 3.75, 18.75, 33.75, 48.75, 63.75, 78.75, and 93.75. Group them together.

3. Place a new 'Cylinder' model and make it 26x26x105 units. Change it to the body color. Place it in the center of first cylinder model and group them together. This is the base of the second tower.

4. Place a 'Cylinder' model and make it 34x34x3 units. Place a 'Cone' model and make it 34x34x34 units. Place the cone on top of the cylinder, group them, and flip them upside down. Change it to the body color. Raise it by 75 units and place it on top of the tower.

5. Place a 'Cylinder' model and make it 30x30x30 units. Change it to the body color.

6. Copy and paste the window model a few times. Adjust the length of them to 32 units. Raise four of them by 3.75 units and put them in the cylinder at the angles 0, 45, 90, and 135. Make sure each window passes through the whole cylinder. Do the same at 18.75 units high. Group the cylinder and windows together.

7. Place a new 'Cylinder' model and make the dimensions 26x26x30. Place it in the cylinder and group them together.

8. Raise the cylinder by 112 units and place it on top of the tower.

9. Copy and paste a second cone and cylinder model. Raise it by 112 units and place it on top of the tower.

10. Place a 'Cylinder' model and make it 30x30x10.75 units.

11. Copy and paste a few more window models. Make them 32 units long and place them in the cylinder model at 0, 45, 90, and 135 degree angles. This time, don't raise the windows up, keep the altitude at 0. Group the cylinder and windows together.

12. Place a new 'Cylinder' model and make it 26x26x10.75 units. Place it in the center of the other cylinder and group them together so that the windows are inset by two units.

13. Raise the cylinder model by 149 units and place it on top of the tower.

14. Place a new 'Cone' model and make it 30x30x60 units. Raise the cone by 160 units and change it to the roof color.

15. Select the whole tower and move it to where it is in the fifteenth photo.

16. Place a new 'Cylinder' model and make it 15x15x30 units. Change it to the body color.

17. Copy and paste two new window models and make them 15 units long. Raise one up by 3.75 units and the other by 18.75 units and place them in the center of the cylinder. Group the cylinder and windows together.

18. Place a 'Cylinder' model and make it 13x13x30 units. Change it to the body color and place it in the center of the first cylinder. Group them together.

19. Place a 'Half Sphere' model and make it 15x15x7.5 units. Change it to the body color and flip it upside down. Align it under the cylinder.

20. Move the cylinder and half sphere up by 145 units, rotate it by 22.5 degrees and place it where it is in the twentieth photo.

21. Place a 'Cone' model and make it 15x15x20 units. Change it to the roof color and move it up by 183 units. Place it on the tower.

Step 9: Main Castle Body (Part 8)

1. Place a 'Box' model and make it 20x10x30 units. Change it to the body color.

2. Copy and paste two new window models. Make them 20 units long. Raise one by 3.75 units and the other by 18.75 units. Place them in the side of the box and group them together.

3. Copy and paste four more window models and make them 10 units long. Raise two of the by 3.75 units and the rest by 18.75 units. Place them in the center of the box 2 units apart. Group the box and windows together.

4. Place a 'Box' model and make it 6x16x30 units. Change it to the body color.

5. Place the second box centered inside the first box and group them together so that the windows are inset by 2 units.

6. Raise the box by 15 units and place it on the front of the castle, as shown in the sixth photo.

7. Place a 'Pyramid' model. Make it 20x20x5 units. Change it to the roof color.

8. Raise the pyramid by 45 units and place it on top of the box model.

9. Place a 'Wedge' model and rotate it by 90 degrees so that the side facing up is parallel to the ground. Make the dimensions of the wedge 10x4x3 unit, and change it to the body color.

10. Raise the wedge by 12 units and copy and paste one more and place them on the bottom edges of the box, as shown in the tenth photo.

Step 10: Castle Back (Part 1)

1. Copy and paste one of the body models we made earlier. Place a 'Box' model and make it 40x20x30 units. Make it a hole.

2. Raise the hole by 30 units and place it in the body model. Group them together so that the only thing that remains is the lower half of the body model.

3. Change the length of the body model so that it is 20 units long.

4. Copy and paste four window models. Make them 20 units long. Raise two of them by 3.75 units and the other two by 18.75 units. Place them in the side of the body model, 2 units apart. Group them together.

5. Place a 'Box' model and make it 18x18x30 units. Change it to the body color and place it in the body model. Group them together.

Step 11: Castle Back (Part 2)

1. Copy and paste another body model. Place a 'Box' model and make it 40x20x15 units. Make it a hole.

2. Raise the hole by 45 units and place it in the body model. Group the hole and model together.

3. Shorten the length of the body model to 20 units.

4. Copy and paste four of the body models and place them in a line next to the first one, as shown in the fourth photo.

Step 12: Castle Back (Part 3)

1. Place a 'Pyramid' model and make it 20x20x10 units. Change it to the roof color.

2. Raise the pyramid by 30 units and place it on the first box, as shown in the second photo.

3. Place a 'Wedge' model and make it 10x10x10 units. Change it to the roof color.

4. Copy and paste a second wedge model and rotate one of them by 180 degrees. Raise both of the wedges by 30 units and place them on the box, connecting the pyramid to the second box model to make a roof. Group the pyramid and two wedges together. Check the fourth image for clarity.

5. Place another 'Pyramid' model and make it 20x20x10 units. Change it to the roof color.

6. Copy and paste a second pyramid and raise both by 45 units. Place them on either end of the boxes, as shown in the sixth photo.

7. Place a 'Wedge' model and make it 10x60x10 units. Change it to the roof color.

8. Copy and paste a second wedge and rotate one of them by 180 degrees. Raise both wedges by 45 units and place them on the boxes, connecting the points of the pyramids to make a roof. Group the two pyramids and wedges together.

Step 13: Castle Back (Part 4)

1. Place a 'Box' model and make it 15x15x15 units. Change it to the body color.

2. Place a new 'Box' model and make it 17x17x1 units. Change it to the body color.

3. Raise the second box model by 15 units and place it on top of the first box. This is the start of another tower.

4. Copy and paste the window model and make it 15 units long. Raise it by 3.75 units and place it in the center of the box. Group them together.

5. Place a 'Box' model and make it 13x13x15 units. Change it to the body color. Place it in the tower and group them together.

6. Copy and paste the tower and raise the pasted tower by 16 units. Place it on the tower, as shown in the sixth photo.

7. Copy and paste just the bottom part of the tower (the original 15x15x15 box). Place a new 'Box' model and make it 15x15x5 units. Change it to the body color.

8. Raise the new box by 15 units and place it on top of the other box. Group them together.

9. Raise the group by 32 units and place it on top of the tower.

10. Place a 'Pyramid' model and make it 15x15x13 units. Change it to the roof color.

11. Raise the pyramid by 52 units and place it on top of the tower.

12. Copy and paste an extra tower and place them on the back section of the castle, as shown in the twelfth photo.

Step 14: Castle Back (Part 5)

1. Copy and paste a second castle back.

2. Rotate one of the castle backs by 22.5 degrees and place it on the corner of the main castle body, as shown in the second photo.

3. Flip the second castle back by clicking the 'Mirror' button on the top right of the screen. and clicking on the horizontal arrow that shows up when you hover over the model.

4. Place the castle back model and place it on the other corner of the main castle body. Don't rotate this one.

Step 15: Castle Back (Part 6)

1. Place a 'Box' model and make it 30x30x60 units. Change it to the body color.

2. Copy and paste a few window models and make them 30 units long. Raise two of them up by 3.75 units and place them in the center of the box, two units apart. Do this at the heights 18.75, 33.75, and 48.75 as well. Group the windows and box together.

3. Place a new 'Box' and make it 28x28x60 units. Change it to the body color. Place it in the first box and group the two boxes together.

4. Place another 'Box' model and make it 29x29x45 units. Change it to the body color.

5. Copy and paste more window models and make them 29 units long. Raise two of them by 3.75 units and place them in the center of the box, two units apart. Do this at the heights 18.75, and 33.75. Group the windows and box together.

6. Place a new 'Box' model and make it 27x27x45 units. Change it to the body color. Center it in the first box and group them together.

7. Raise the second group by 60 units and place it on the first box group. This is another tower.

8. Place a 'Pyramid' model and make it 32x32x96 units. Change it to the body color.

9. Rotate the pyramid upside down and raise it by 18.5 units. Place it in the tower.

10. Place a 'Box' model and make it 32x32x5 units. Change it to the body color. Raise it by 114.5 units and place it on top of the tower.

11. Place a 'Cylinder' model and make it 28x28x20 units. Change it to the body color.

12. Copy and paste more window models. Make them 30 units long. Place them in the center of the cylinder at the angles 0, 45, 90, and 135. Group them together.

13. Place another 'Cylinder' model and make it 26x26x20 units. Change it to the body color. Place it in the first cylinder and group them together.

14. Raise the cylinder group by 119.5 units and place it on top of the tower.

15. Place a 'Cone' model and make it 31x31x93 units. Change it to the body color.

16. Flip the cone upside down. Raise it by 56 units and place it on top of the tower.

17. Place a 'Cylinder' model and make it 31x31x5 units. Change it to the body color. Raise it by 149 units and place it on the tower.

18. Place a 'Cone' model and make it 31x31x20 units. Change it to the roof color. Raise it by 154 units and place it on top of the tower.

19. Place the tower on the end of the castle back, as shown in the nineteenth photo.

Step 16: Castle Back (Part 7)

1. Place a 'Box' model and make it 100x40x15 units. Change the color to b0b0b0. Place it in the space between the castle backs. This is the floor.

2. Place a 'Wedge' model and rotate it on its side. Make the dimensions 98x42x15 units. Change it to the floor color and place it next to the first floor, as shown in the second photo. Group it with the first floor model.

3. Place a 'Cylinder' model and make it 45x45x15 units. Change it to the floor color. Group it with the rest of the floor.

4. Place a 'Box' model and make it 22x30x15 units. Change it to the floor color and line it up with the cylinder model, as shown in the fourth photo. Group it with the rest of the floor.

5. Place another 'Box' model and make it 15x20x15 units. Change it to the floor color and line it up with the castle back and rest of the floor. Group this and the floor together. Check the fifth photo for clarity. Once this is done, check the floor from a bird's-eye view for any gaps between the buildings. If there are, fill them in with a new 'Box' model and group it with the rest of the floor.

Step 17: Castle Back (Part 8)

1. Place a 'Box' model and make it 1x20x14 units. Change it to the floor color. Place another 'Box' model and make it 1x20x13 units. Change it to the floor color and line it up with the first box.

2. Continue creating boxes one unit shorter until you are at 1 unit tall to make a staircase. Group them together. Check the third photo for clarity.

3. Place the staircase on the corner of the floor, as the third photo shows. Group the staircase and floor together.

Step 18: Castle Back (Part 9)

1. Place a 'Cylinder' model and make it 45x45x20 units. Place another 'Cylinder model and make it 51x51x20 units. Change the smaller cylinder to a hole and the larger one to the body color.

2. Place the hole inside the cylinder model and group them together. Line it up with the circular part of the floor, as the second image shows. This is going to be a wall.

3. Place two 'Box' models and make them holes. Change the sizes of the models so that they are able to cut off the sections of the wall that are in the floor, as shown in the third photo.

4. Group the holes and cylinder together.

5. Place a 'Box' model and make it 3x40x20 units. Change it to the body color and line it up with the cylinder wall. Group the walls together. Check the fifth photo for clarity.

6. Place a 'Box' model and make it 3x45x20 units. Copy and paste to make two of them. Make one of them a hole and the other the body color.

7. Place the hole against the end of the castle back, as shown in the seventh photo. Make sure it lines up with the corners of the castle.

8. Group the hole with the floor.

9. Place the box model where the hole was to make a wall, as shown in the ninth photo.

Step 19: Castle Entrance (Part 1)

1. Copy and paste two of the body models (the one that is 60 units tall) and place them directly next to each other. Make the lengths 20 units instead of 40 (I forgot to do this, but it will be fixed in the next few images).

2. Place a 'Roof' model and make it 20x20x12 units. Place another that is 18x20x11 units, and copy and paste a second one. Change the larger one to the roof color. Change one of the smaller ones to a hole and the other to the body color.

3. Place the hole in the center of the larger roof model and group them together. Copy and paste a window model and make it 20 units long. Raise it by 1 unit and place it in the center body-colored roof, grouping them together.

4. Place a 'Roof' model and make it 18x18x11 units. Change it to the body color and group them together. Place the body-colored roof inside the larger roof. Raise the two models by 60 units and place them on top of the two body models.

5. Copy and paste 4 body models (the one that is 45 units tall) and place two on either side of the entrance, as shown in the fifth photo.

Step 20: Castle Entrance (Part 2)

1. Place a new 'Box' model and make it 7.5x20x45 units. Change it to the body color.

2. Place the box in front and center of the building, as shown in the second photo.

3. Place a new 'Box' model and make it 27x15x20 units. Place a 'Cylinder' model and make it 15x15x27 units. Rotate it sideways, raise it to 12.5 units and place it on top of the box, like you did in the window model earlier. Group them together. Copy and paste the group and make one of them a hole. Place it in the center of the box model, through the whole building. Group the hole and building together. Check the third photo for clarity.

4. Take the other group (the one you didin't make a hole) and change the length to 24 units. Change the color to 4a301a (this will be a door). Place it in the opening, as shown in the fourth photo.

5. Place a 'Cylinder' model and make it 7.5x7.5x10 units. Place a 'Half Sphere' model and make it 7.5x7.5x3.75 units. Flip the half sphere upside down and place it under the cylinder. Group them together and make it the body color.

6. Place a new 'Cylinder' model and make it 5x5x2.5 units. Make it a hole. Raise it by 11.25 units and place it in the group from the previous step. Group them together.

7. Place a 'Box' model and make it 10x1x2.5 units. Make it a hole and raise it by 11.25 units. Place it in the cylinder model at the angles 0, 45, 90, and 135. Group the together. Check the seventh photo for clarity.

8. Copy and paste a second group model. Raise them by 35 units and place them on the upper corners of the first box model, as shown in the eighth photo.

Step 21: Castle Entrance (Part 3)

1. Place a new 'Pyramid' model and make it 20x10x1 units. Change it to the roof color. Copy and paste a second one and raise them by 60 units and place them on either end of the center roof, as shown in the first photo.

2. Place a 'Wedge' model and make it 10x6x1 units. Change it to the roof color. Copy and paste four of them. Raise them to 60 units and place them on the side of the roof, as shown in the image. Group the roof together.

3. Copy and paste two more body models (the ones that are 45 units tall) and place them on the ends of the entrance, as shown in the third photo.

4. Copy and paste new window models and make them 120 units long. Raise two of them by 3.75 units and two more at both 18.75 and 33.75 units tall. Place them in the center of the side of the entrance, two units apart. Group the entrance and windows together.

5. Place a new 'Box' model and make it 18x118x45 units. Change it to the body color. Place it in the entrance building and group it with the rest of the building so that the newly cut windows are inset.

Step 22: Castle Entrance (Part 4)

1. Place a 'Pyramid' model and make it 20x20x10 units. Change it to the roof color and copy and paste four of them. Raise them by 45 units and place them on each of the corners of the top of the entrance building. Check the first image for clarity.

2. Place a 'Wedge' model and make it 10x20x10 units. Copy and paste four of them. Copy and paste four more and make the lengths of them 30 units. Raise all the wedges by 45 units and place them on the roof, as we have done before. Group the roof models of the entrance together. Check the second photo if needed.

3. Place the entrance in front of the castle, lined up with the wall that was created earlier. Check the third photo for clarity.

Step 23: Castle Entrance (Part 5)

1. Place a 'Cylinder' model and make it 15x15x60 units. Change it to the body color.

2. Place a 'Cone' model and make it 17x17x17 units. Change it to the body color and flip it upside down. Raise it by 45 units and place it on the cylinder. This is the base of another tower.

3. Place a 'Cylinder' model and make it 17x17x3 units. Change it to the body color. Raise it by 62 units and place it on the tower.

4. Copy a few more window models. Change the length to 17 units. Raise four of them by 3.75 units and place them at the angles 0, 45, 90, and 135. Do this at the heights 18.75, 33.75, and 48.75 units as well. Group it with the tower.

5. Place a 'Cylinder' model and make it 13x13x60 units. Change it to the body color. Place it in the tower and group them together.

6. Place a 'Cone' model and make it 17x17x12 units. Change it to the roof color. Raise it by 65 units and place it on the tower.

7. Copy and paste a second tower and place them on the corners of the entrance, as shown in the seventh photo.

Step 24: Castle Base

1. Group together all of the body colored models. This will get rid of a lot of the lines in between different sections of the building.

2. Raise the whole castle by 50 units.

3. Place a series of wedges, cones, and pyramids to create a base for the caste that extends outwards. Make the color of the base ada395. Group the base together. Check the third photo for clarity. It's okay if there are slight gaps because those will be filled in later. For reference, the bottom of my base extends 20 units past the top.

4. Raise the whole castle and base by 100 units. Place a 'Sphere' models of different sizes to create a cloud. The cloud can by either white or a light blue. I used f2fcff. I used spheres that are 40x40x40 units.

5. Place a 'Box' model and make it 60x110 units (the height doesn't matter). Change it to the floor color. Raise it to the height of the floor, as shown in the fifth image.

6. I raised the whole model up by 200 units so that it looks like it's more up in the sky.

Step 25: Making a Rainbow (Optional)

1. Place a 'Tube' model and make it 500x500x5 units. Change the wall thickness to 1 unit in the shape menu that pops up when the model is selected.

2. Change the color of the tube to red. I made it the hex color ff0017. Make the model transparent by clicking the 'Transparent' box that shows up in the shape menu under the hex color box.

3. Place a new 'Tube' model and make it 449.2x449.2x5 units. Change the wall thickness to 1 unit, and make the color ff9500. Make the shape transparent, and place it in the other tube.

4. Place a new 'Tube' model and make it 400x400x5 units. Change the wall thickness to 1 unit, and make the color fffd2b. Make it transparent, and place it in the tubes.

5. Place a new 'Tube' model and make it 350x350x5 units. Change the wall thickness to 1 unit, and make the color 0af200. Make it transparent, and place it in the tubes.

6. Place a new 'Tube' model and make it 315x315x5 units. Change the wall thickness to 1 unit, and make the color 6173ff. Make it transparent, and place it in the tubes.

7. Place a new 'Tube' model and make it 278x278x5 units. Change the wall thickness to 1 unit, and make the color 901ff5. Make it transparent, and place it in the tubes.

8. Place a 'Box' model and make it 500x500x5 units. Change it to a hole and copy and paste six of them. Place the holes and group one with each of the rings so that there is only have of the tubes left over. Make sure you don't group the tubes together because the colors of the tubes will change. Check the eighth photo for clarity.

9. Rotate the rainbow 90 degrees so that it is perpendicular to the workplane. Raise the rainbow by 445 units and rotate it by 50 degrees. Place it slightly behind the castle, and rotate the castle by 22.5 units.

10. Play around with the height and width of the rainbow to make it the shape that you like.

11. Use the same technique to make the clouds as you did for the castle. I made the spheres 50x50x50 units and made the color the same as the other clouds. Do this on either end of the rainbow.