Send balls swirling from start to finish—down a winding coaster kids build themselves! With the real-working 2-in-1 drill, it’s a cinch to assemble the twisting tracks and power your coaster. After you’re finished building, just insert the drill motor into the spiral column, switch on the action and watch the balls go! You get 55 pieces and a step-by-step guide. Coaster measures 12 3/4" tall. Requires 2 “AA” batteries (not included).