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Experience the power of gravity with the GraviTrax Obstacle Starter Set magnet toy. Use your imagination to design your track and set the gravity spheres rolling. The GraviTrax Obstacle Starter Set construction toy is an amazing STEM track system that teaches kids about gravity and magnets. Freestyle your own track design or use the tasks and blueprints included to get started. Are the gravity spheres stopping or flying off before reaching the end target Rebuild and try something different with this versatile magnet toy! The GraviTrax Obstacle Starter Set construction toy comes with over 140 components so youll have everything you need to get started. It includes 4 base plates 2 transparent levels 6 balls 74 tiles 21 curves 3 junctions 2 switches a 3-in-1 block vortex launch pad 14 tracks 3 bridges 3 transfers 2 trampolines a zipline 2 spirals a finish line 2 catchers a freefall splash and landing.