Evil and deviled possessed kids pushing the ball down the hill with extra speed!
This is the rolling tumbler piloted by a child safely ensconced inside its protective inflatable honeycomb structure. Made from heavy-duty 1/8"-thick PVC, 30 hexagonal chambers form the tumbler’s globular shape; each end provides a 13 3/4" diameter opening that allows entry for a child up to 100 lbs. With ample room in the interior for changing position, a child’s shifting body weight is the only requirement to generate momentum–Newtonian physics provides the physical comedy. Ten transparent chambers enable pilots to avoid obstacles, ensuring a proper heading when aiming for rivals.
More info: The Child Tumbler