Rubber bouncy ball

The epitome of joy in materials. This delightful responsiveness of a bouncy ball, translates the gentle energy in your throw, or the gravity in your drop into an enthusiastic Boing. And it’s so round and neat. In fact, that’s why it’s so energetic. If it was flat or lumpy it would boing awkwardly or lose energy as the vibrations travel around the form and peter out. But a sphere keeps everything inside to boing brightly and logically in regular arcs, so it can be caught and boinged again.