He persisted with a kids' toy idea that he developed at his kitchen table, and today, Ollyball has sold over 3 million units and has won multiple awards, including Toy of the Year. Ollyball is an inflatable ball designed for "full-speed, full-force indoor play." Sign up here to reserve your spot and have the opportunity to ask Joe your own questions live. I knew if we could invent a ball for parents to let their kids play with in the house, we would sell millions of them. I would take the kids to the Kids Club at 24-Hour Fitness and have them bring the prototypes with them.