Shelcore - Shake N Bobbles Rev'N Racer Set the Bobble driver into the drivers' seat, press him on his head, and watch as he takes off down the speedway. One of three sound sequences are heard with each press of the Bobble driver's head. Spoiler moves up and down for added movement. Race Car moves forward & backward approximately 7 feet. Tires squeal as the car zooms down the track.