Imagine how joyful your babies or toddlers will be when they're having fun with these baby play balls! The pool balls are made of PE, which is durable and lightweight. With a diameter of 6 cm, your kids can easily grab the balls but not swallow them. After being pressed, the toy balls return to their shape. Fill baby pools, kid's play tents, paddling pools and so much more with these playballs, then enjoy hours of fun!