Glad you asked...
The practice of making three dimensional shapes out of paper is called origami. A common example of origami would be the paper planes that many children make in school. Here is a website that shows many other examples of origami, plus directions on how to produce the same results. http://www.origami-instructions.com/...
Then again, this answer might help you...
There are various shapes that you can make 3-D. To make a cube shape you can either make a pattern or you can find many online at various sites. Take your pattern which will consists of 4 equal squares down the middle, on the bottom of the middle square you will want to angle it like this (___/) on all three outer sides. On the second square you will want to draw two more equal squares. Then on the the two short sides of these squares you will draw the above diagram again. Drawing this diagram on both sides of each square, now you will fold the squares to form a cube. Glue the cube together and there you have it a 3-D cube.

