Award winning toy created by the mind and eye of Chuck Hoberman. They expand and contract with a magical motion using a combination of geometry, and engineering. Its system of polymer links expands and contracts almost effortlessly changing in volume 30 times.
– Original Size
– Includes an educational booklet about the sphere, a 21 Cool Things To Do activity sheet, a pulley, and hanging hardware.
– Instructions for hanging as a cool kinetic energy mobile.
– Magically expands from 9.5″ to 30″
– For ages 4+