Modular origami
Kusudama is a particular sort of modular origami. Modular origami involves two or more pieces of paper (sometimes hundreds!) and models can vary immensely in difficulty and the number of pieces of paper. The word itself is a combination of two Japanese words: kusu meaning medicine and dama meaning ball. They were originally used for things like incense and potpouri; however, they are now normally used just as decorations.