Construction Toys Ravensburger

Take your marble for an unexpected spin with the “GraviTrax Loop” accessory! Turn the marble upside down with the Loop accessory. Experiment with how much speed the marble needs to loop-the-loop. This more→accessory also includes 6 additional tracks. GraviTrax Starter-Set required What makes a great toy? GraviTrax checks all the boxes! It’s a creative, modular, expandable track system that challenges children to use their imagination to design and build their own marble runs! Electronic-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