This is the marble raceway that allows two children to compete in an exhilarating, timed run as they each start a marble down its own twisting, obstacle-laden track. Competitors release both marbles with the press of a button which simultaneously activates the clock at the finish line. Assembled from 420 plastic pieces, each marble encounters two sets of spinning wheels, three sets of dips, a chicane, and a corkscrew, a "tire" course (similar to how a ball randomly falls through a pachinko machine), a lane switching trigger, and a pair of weighted levers. When a marble reaches the finish line, the clock stops and flashes "Winner" on its screen, accompanied by cheers. Includes four marbles. Requires two AA batteries. Ages 8 and up. 26 1/4" L x 9 1/4" W x 30 1/2" H. (51 lbs.)