Perform five energetic experiments with elasticity. Test the bouncability of two different sized super bouncy balls, create your own rubber band ball, watch hemi-balls flip and hop, create a rubber band shooter, and even make your own bouncy balls from scratch. -- Using molds of different shapes and the Ein-O bounce granules, you can create your own bouncy balls and test their bouncability too. Includes an instruction booklet with scientific explanations behind each experiment.