Problem solving made fun! Helps educates the laws of structural engineering and stimulates spatial thinking. The hardwood blocks with grooves and holes can be combined in a variety of ways to reach the end result of 6 marbles ringing the bell to signal success. This classic toy from HABA is the recipient of 3 prestigious toy awards: Dr. Toy Best Classic Toy, Dr. Toy Best Green Toy and Dr. Toy Best Vacation Product. The pack includes: zigzag track, a bridge with bell, 4 redirection blocks, 2 tunnel blocks, 4 ramps, 14 rectangular blocks, 8 square blocks, 2 bridging blocks, 6 columns, 6 marbles and an instruction booklet. A wide range of ball track accessories sold separately for future expansion and this toy is fully compatible with all Building systems from HABA including My First Ball Track & Building Blocks.