Ravensburger GraviTrax PRO Helix Add On Extension Accessory - Marble Run, STEM, Construction Toy for Kids Age 8 Years Up

When a marble enters the Helix it will move down to a lower level without changing its direction. Up to six marbles can pass through this Action-Stone at the same time! Build new routes and create crazy trick shots, expand the marble run with new ideas, expansion sets 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 GraviTrax is made with premium quality materials adhering to the highest UK and EU standards and regulations. STEM and construction toys for kids age 8 years up. Great Christmas gifts and birthday presents for children. A GraviTrax Starter Set is required to use expansion packs & accessories. No batteries required. Other accessories sold separately. Number of players: 1+, Manufacturer: Ravensburger