Origami

Origami (折り紙^?, from oru meaning "folding", and kami meaning "paper") is the traditional Japanese art of paper folding. The goal of this art is to create a representation of an object using geometric folds and crease patterns preferably without gluing or cutting the paper, and using only one piece of paper. In modular origami several identical units are combined to form a figure.

From http://en.wikipedia.org/wiki/Origami