The Hoberman Sphere is an expanding/contracting ball you can play with or enjoy as an object of art; it combines mathematics, geometry and aesthetics into a magical motion of surprising simplicity, beauty and fun.
Play catch, bounce it on carpet, spin it and learn other tricks!
The Hoberman Sphere is available in 2 sizes:
Original – expands from 9.5″ to 30″
You can also hang your Original Sphere from the ceiling (instructions are included). If you install the pulley and line provided, you can make a mobile that expands and contracts when you pull on the ring!