HABA Ball Track Large Basic Set - 42 Piece Wooden Marble Run for Beginner to Expert Architects(Made in Germany)

Who would think problem solving could be so much fun? An exciting marble rolling game that is both educational and fun. Hardwood blocks with grooves, and holes are combined in a variety of ways with the end result of 6 marbles ringing the bell to signal success. This ball track includes 42 pieces.