Machrus's Upper Bounce Trampoline Pit Balls are the perfect plastic balls for any trampoline or ball pit. This set comes with 200 pieces of non-toxic, crush-proof, kid-friendly play balls. These play balls are a great tool for building your child's motor skills and are lots of fun for all ages! The Machrus Upper Bounce pit balls have been tested and exceeded all CPSC standards for a safe and healthy playing experience. Each ball measures 2.3 inches and fits perfectly in a child's hands without being too small or too big. Great for filling any trampoline, ball pit, tent, playhouse, pool or bouncy house! These are also UV resistant and weatherproof to withstand extensive outdoor use. Let's go out and play!