loading
This instructable will (hopefully) demonstrate how to make a stellated octahedron out of a single square of paper. You will need one square of paper.

I've added new pictures to make the process more clear.

Step 1: Sixteen Squares

Fold your square as seen in the picture to create 16 smaller squares within it.
Starting with the colored side up, fold in half, then fold the ends to the crease you made by folding in half. Do this in both directions.
Flip your paper over.

Step 2: Sixty-four Triangles

Make diagonal creases as shown in the picture(s), using the squares you just made as guides.
To do this, fold the diagonals of the whole square, then fold each corner to the corners of the three squares it fits with Leave the smallest triangles you make down.

Step 3: Collapse

Note: This is like folding a waterbomb base with the corners folded in.

Collapse the model as seen in the pictures so that it looks kind of like the profile of a diamond (The gem kind, and upside-down).

About the video: Green lines are mountain folds (pointed out towards you), red lines are valley folds (pointed away from you). I don't know what the .MOV format is, but I managed to open it in IrfanView, which is an awesome free program. Sorry, my camera has no sound.

The images with the blue backgrounds may be more useful than the older images.

Step 4: Tuck

Again, the pictures with blue backgrounds might be easier to follow.

Fold the point of one flap to the angled crease opposite it, then fold the tiny triangle back. Repeat for other 3 flaps.
Tuck the triangles visible under the triangles you just folded into the triangles you just folded.
Repeat with other three flaps.

About the videos:
P10103700 shows me folding to the creases marked in the first picture and folding the small triangle back along the crease that's already there as shown in the second.
P101072 shows me tucking one of the smaller triangles into the small triangle as shown in the fourth and fifth pictures.

Step 5: Inflate

Grab the model on both sides to separate the flaps and blow in the hole to inflate it.
Yes, we can all see sexual innuendo if we want to.

If blowing doesn't work, you can pull/squeeze it into its 3d shape.

Step 6: Poke and Pinch

Poke in the creases that popped out when you inflated the model to create the pointed shape. You may want to pinch the creases of the pyramids to help retain the shape.

The last 4 pictures are just so you can get a better idea of how the shape is formed.
I’ve seen The diagram for this model designed by Sam Cuilla, published in Origami/30 fold-by-fold projects Paulo Mulitanho
it would be better if you used one sided colored paper because it would be much clearer
Thanks :) I just added pictures with colored paper.
Try using solid colored rice paper. The solid color makes it easier to see and the rice paper is a little stiffer than the usual practice paper, so it will hold the creases better. And, as I tell my students, fold NEATLY at every step. Make sure everything lines up exactly -- no fudging. If you run a fine piece of wire through the center, put a bead at each end and bend a hook at the top, it also makes a great ornament! Thanks for posting this -- I learned to do this pattern at an sf convention and I've lost the instructions that were passed out there.
Behold my colored rice paper! Hope this is better.
omg 1288 views and only 3 ratings...
Sad, isn't it? Everyone just reads it and leaves.
wow... this is really cool
this is.... idk
Good job
this is better than the original paper balloon
Got it :) Really cool, and elegant. Thanks a lot for this one!!!!
no problem :)
:( I fail when I blow it up... well kind a... When I blow it up the corners unfold and the box comes apart. So I can't really complete it. I'm going to try some tape. I can make the regular boxes, but this one looks so much better.
Creasing the folds more when you're at step 4 picture 6 might work. If not, tape should work too, and you'll get better if you keep making them. It might also be easier to blow up one of a different size without it coming apart.
Isn't this also an alternative way of making a waterbomb? This is nice, although maybe steps three and four would benefit from a video as well?
I'm sure you could use it as a waterbomb, but if you're going to fill it with water and throw it, you may as well spend less time making the box kind. Unless you want to bomb someone with class, I guess. I can try making a video, but my digital camera only allows 15 second videos in .MOV format, and I have no video editing software. Do you know of any free video editing programs?
I use Windows Movie Maker for mine - I use Imtoo to convert the MOV files to WMV files first. They're both free downloads.
I uploaded 3 videos, but I'm not sure how helpful they will be. Let me know if you think they're useful.
I am very impressed...
Thanks :)

About This Instructable

18,534views

6favorites

License:

More by goobyalus:Installing an NVIDIA graphics driver on Ubuntu (9.04) Single Sheet Origami Stellated Octahedron 
Add instructable to: