The Hoberman Sphere™
Product Number: TB18334
In Stock (Ships within 1-2 business days)
Combines mathematics, science, and technical education into a magical motion of surprising simplicity, beauty, and fun. Its system of polymer links expands and contracts almost effortlessly, changing in volume 30 times. A great tool for teaching physical science and technical education. Expands from 9-1/2 in. to 30 in. Grade 1 and up.