Abstract: A tumbler toy containing typically four ramp surfaces placed radially at a fixed angle. When a player rotates the toy, all of the ramp surfaces rotate simultaneously and a ball can be made to roll along the ramp surface until it encounters an opening in the ramp surface. When the ball descends through this opening it is deflected by a guide placed along the ramp surface. With experience and practice a player can rotate the tumbler toy either clockwise or counterclockwise and keep the ball moving from ramp surface to ramp surface indefinitely.