I had a couple beach balls that were up in my closet that hadn't bee played with in a long time and earlier I blew up 3 more! Now I have several balls to play with, hehe! Big and small! I start to roll on all of them, full putting my weight on them. I even take turns bouncing on each ball. I quickly notice that the largest ball is pretty deformed and this excites me! I can't help but try to achieve this result with the other balls. I've always enjoyed my inflatables! Especially beach balls!