The GraviTrax Starter - Set XXL has all the pieces you need to build a ‘mega-sized marble run’ – 242 pieces designed to encourage open-ended play. GraviTrax is a creative, modular, expandable track system that challenges children to use their imagination to design and build their own marble runs! Electronics-free, GraviTrax construction sets use STEM-friendly concepts while building critical thinking and problem-solving skills. Completely open-ended, every GraviTrax set has a boredom-busting variety of play options for hours of fascinating fun. For 8 years +
