Kusudama

medicine ball) is a paper model that is usually (although not always) created by sewing multiple identical pyramidal units together using underlying geometric principles of polyhedra to form a spherical shape.

(e.g. the kusudama in the lower photo is not threaded together) Occasionally, a tassel is attached to the bottom for decoration.

Modern origami masters such as Tomoko Fuse have created new kusudama designs that are entirely assembled without cutting, glue, or thread except as a hanger.

Waritama are large, spherical decorations that split in half to release confetti, streamers, balloons, etc.

An emoji depicting a waritama, called Confetti Ball (🎊), was introduced with the October 2010 release of Unicode 6.0.