The scaled-down version of Chuck Hoberman's award-winning sphere, the Hoberman Mini Sphere is an engineering wonder and lots of fun. It's geometry at play that you can throw, kick, bounce and magically expand from 5.5" to 12" with just a touch. Made of linked plastic studs.

Includes activity sheet.

For ages 4 yrs and up.

WARNING: Choking hazard. Small parts. Not for children under 3 years.