New studies show that children who play with early development toys perform better in school. This set of bouncy balls is a type of developmental toy. They are made of quality material and will never harm your children if used correctly. Do not throw them into fire or with needles, everything mentioned above is dangerous! Feature - Color: Assorted. - Material: PVC. - Flat size: Approx. 22 cm/8.7 inches in diameter - The package includes 5 pieces of bouncy balls. - Made of high-quality PVC material, it is durable and crush-proof. - Play balls can fill any ball pit, tent, playhouse, children's pool, playpen, and bouncy castle - Bouncy balls are great gifts for children, they will have fun playing with them. - Develop your children's sensory learning, hand-eye coordination, color recognition, and motor skills. Package list: 1 x set of 5 plastic air-filled ball pit bouncy balls for toddlers and children playing