Description These plastic balls are great for ball pits, jumping castle and pools. They are safe to use and made to last a long time without having the air Using a unique 2-stage blow molding process to ensure consistency of thickness; quality; smooth seam & surface. Safe and friendly to use. Designed as a safe and non-toxic educational toy. They promote sensory learning, hand-eye coordination, color and counting recognition, and motor skills. Studies have shown that children with early developmental toys have better chances to success in school.