- A bestselling construction activity for boys and girls 8 and up – over 6 million sold worldwide
- Includes 242 pieces and 9 ready-to-go track instructions to start creating your own tracks
- The ideal Christmas gift for creative, curious kids who love to build
- Power the marbles with gravity-based elements in a race to the finish
- Customize and experiment with tricks and stunts to keep the marbles rolling faster and further.Experience educational and science play with 24 problem-solving building exercises
