The Hoberman Mini Sphere Firefly Glow is an awesome stress relief toy. This glow-in-the-dark ball expands from 5 inches to 12 inches with one easy motion. The simple function of this transforming sphere makes it an extremely addictive desktop fidget toy. Your co-workers will most likely visit you just to play with it. This is the original mini transforming sphere from Hoberman and it will help liven up your workspace.****Features:*** Expands from 5 inches to 12 inches *** Glow in the dark*** Ages 4 and up