This is an origami Companion Cube design. It is based on the origami pattern called a water bomb. I found the pattern some time ago on Microsoft Publisher but for those of you without it, the following site has instructions on how to make it http://www.instructables.com/id/Origami-Water-Bomb/. When you print out the design you will need to square off the piece of paper before you start folding. If you are using paper with a width of 8.5' all you will need to do is cut along the dotted lines at the top and bottom of the design. Do not cut the sides. I know it's not a perfect looking Compainion Cube but it looks pretty good considering it was a first attempt done during a bad case of insomnia. Enjoy.

i used to make those all the time, though i have long since forgotten, i can still make ninja-stars, and those little game things that kinda look like flowers (the ones on south park that the boys thought the girls were using to see the future), and a pretty sweet paper airplane ufo. but i forgot how to make the water bombs. so thanks for this! me and my boy are gunna cause some havoc now!

hey, it would be nice, but you gave us a link for a water bomb, and there is a wrong file in the attachment of your post. Did I miss something or could you post the right one, pls?