Tower Challenge Puzzle Game: Tower Challenge contains six silvery discs. Your goal is simple: move them one by one from Tower A until the entire stack is on Tower C. The catch? You can never place a larger disc on top of a smaller one. Tower Challenge enables you to start easy and work your way up. Includes 1 plastic puzzle, 6 discs and instructions. For ages 8 and up. UPC: 714043011649