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Make five colourful, rubbery balls resembling planets in minutes. Using a spherical mold and five colours 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 bo...Read more
Make five colourful, rubbery balls resembling planets in minutes. Using a spherical mold and five colours 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.
Ages 8+