Knockerball® is a single-chamber inflatable plastic bubble with inner handles and adjustable shoulder straps. Players get in the “donut-hole” part of the ball head-first, secure the straps (like a backpack) and hold on to the inside handles for stability and control. Once inside, the Knockerball® acts as a protective barrier with the player’s head and entire upper-body safely surrounded by the bubble. What makes a knockerball truly special, however, is that unlike a human hamster ball, the player’s legs are free. This allows them to run, bump, and play classic games like soccer, capture the flag, and musical chairs with a whole new perspective, and that’s when the fun begins!