These fun versions of exercise balls provide the comfort of exercise balls with feet for stability. It won't roll away from you. The fitness chairs are comfortable and ideal for sitting after surgery or injury because it dissipates the pressure on the rear, allowing for faster healing. We also have exercise balls that are jumpers and ideal for children. Physical education classes love our exercise balls with handles because the kids can control them and get an exciting laughter filled workout packed into a P.E. class.