Ravensburger Gravitrax Starter Set Marble Run & STEM Toy For Kids Age 8 & Up – Endless Indoor Activity for Families

• A bestselling construction activity for boys and girls 8 and up – over 6 million sold worldwide
• Includes 122 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