Overview Similar Products –> Product Description GRAVITRAX MARBLE RUN – Create the element of surprise! Bypass large gaps with the Bridges expansion pack. CONSTRUCTION GAMES – 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. STEM TOYS – Experiment with gravity to power your ball through twists, loops and turns in a race to the finish line great christmas gifts and birthday presents for kids and children age 8 years up. PREMIUM QUALITY – GraviTrax is made with premium quality materials adhering to the highest UK and EU standards and regulations. GRAVITRAX STARTER SET REQUIRED – A GraviTrax Starter Set is required to use expansion packs & accessories. No batteries required. Other accessories sold separately. Product Videos Custom Field Product Reviews Write a Review Write a Review GRAVITRAX EXPANSION BRIDGES Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *