I'm playing with 3 large beach balls. I sit on them and I use my bare foot to step on and roll one around....but one of them has to go. One by one I take wooden toothpicks and poke them into the beach ball as I'm sitting on it. I turn my beach ball into a spike ball. I keep inserting the toothpicks and removing them so I can let some air escape and then trap it again so I can keep playing with it. I bounce on it and I squeeze the beach ball with my legs until all the air eventually escapes.