A cd light. It works by taking light . Different elements make different colors.this is very good toy for playing.

Step 1: First

A CD that can be sacrificed to this project.I won't damage it, but getting it back will involve destroying our cd light.

A cardboard box. An 10 inch cube works fine, but any size that can hold a CD disk will do.

Two single edged blades. These can be found in hardware stores.

A small cardboard tube, the kind used as a core to wrap paper on.

Some tape.

Some aluminum tape (found in hardware stores), or some aluminum glue.

Step 2: Second

My cd light has three main parts. There is a slit made from two blades, a diffraction grating made from a CD disk, and a viewing port, made from a paper tube.

To make sure that all three parts are lined up properly, we will use the CD disk as a measuring device, and mark the spots where the slit and the viewing port will go.

Set the CD disk on top of the box, about a half inch from the left edge, and close to the box's bottom. Use a pen to trace the circle inside the CD disk onto the box. This mark shows us where the paper tube will go.

Step 3: Third

Now place the paper tube on the box, centered over the circle i just drew. Draw another circle on the box by tracing the outline of the paper tube.

Step 4: Forth

Move the paper tube over a little bit. A half-inch is probably fine I placed it much farther to the right than necessary, but the aluminum tape covered up the mistake nicely. Trace another circle around the paper tube. These circles will tell us where to cut the box.

Step 5: Fifth

Now cut an oval out of the box with a sharp knife. The oval will allow the paper tube to enter the box at an angle.

Step 6: Sixth

The next step is to make the slit. Turn the box one quarter turn so the oval we just cut is to the right. Using the CD disk again, draw another small circle close to the left side of the box.

The slit will be on the far left of the box. Cut a small rectangle out of the box at the height marked by the small circle we made with the CD disk. The rectangle should be about a half inch wide, and two inches high.

Step 7: Seventh

Carefully unwrap the two blades, and set them over the rectangular hole. Make their sharp edges almost touch. Tape the blades to the box, being careful to leave a gap between the sharp edges that is nice and even, and not wider at the top or bottom.

Step 8: Eighth

Next, set the box right-side-up, with the slit towards you. Now tape the CD disk onto the back wall of the box. The rainbow side should face you, with the printed side touching the cardboard. The disk a little too far to the left. The left edge of the disk should be the same distance from the left of the box as the slit is.

Step 9: Ninth

Now seal up any places on the box where light might leak in. Use the aluminum tape for this. i can also use aluminum foil for this purpose if i don't have any aluminum tape

Step 10: Tenth

The last step is to use the aluminum tape to attach the paper tube. The aluminum tape will make a light-tight seal around the tube. To make sure the angle is correct, hold the slit up to a light, and look through the paper tube, adjusting it until you can see the full spectrum from red to purple.

That's it! We are ready to use the cd light