Ravensburger GraviTrax PRO Giant Starter Set Marble Run, STEM & Construction Toys for Children Age 8 Years Up [Amazon Exclusive]

409 building components and 8 Extensions promise numerous construction possibilities and provide the perfect introduction to the world of GraviTrax. Create exciting race tracks with GraviTrax – STEM and construction toys for kids age 8 years up Build new routes and create crazy trick shots, expand the marble run with new ideas and extensions to keep the ball rolling – compatible with all GraviTrax & GraviTrax PRO sets & accessories Experiment with gravity to power your ball through twists, loops and turns in a race to the finish line – great building game for boys & girls No batteries required. Clear instructions included. Other accessories sold separately. A smashing birthday gift or present for children Number of players: 1+, Manufacturer: Ravensburger