Make five colorful, rubbery balls resembling planets in minutes! Using a spherical mold and five colors of polymer granules, cast up to five rubbery planet models. Learn why the balls form and how the elasticity of the polymer material causes them to bounce.

Includes a spherical mold and five colors of polymer granules (red, orange, yellow, blue, purple) to safely cast your planet models.

Ages 8 - 98