This award winning glow in the dark sphere magically expands 30 inches in diameter and contracts to a compact 9.5 inches.
No assembly required! Math, science, and art collide in this Hoberman Original Expanding Mini Glow Sphere. This expanding universe comes with a "21 Cool Things To Do" game sheet and education booklet as well. Push on any hub, tap it or roll it and it magically closes again. Leave the sphere in direct sunlight for one to two days to activate its "glow". Play catch in the dark, use it as a night sky room decoration, or hang it as a mobile with provided hardware! Hold the universe in your hands!