Discover how to mould bouncy balls and how to launch them into space! Discover the science of elastic collisions. Each kit contains enough material for the experiments to be repeated several times. For children ages 10 and up.Contents: 40g Red Water based moulding granules, 40g Green Water based moulding granules, 40g Yellow Water based moulding granules, 4 Moulds, Safety Goggles and Color Instruction Booklet .