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The Gravitrax is an ingenious toy that prompts kids to use creative thinking and problem solving as they absorb some foundational concepts of kinetics, gravity, and magnetism. It’s a modular system that lets kids build their own marble run with tracks, curves, and lifts in addition to more complex pieces like the one that sends alternate marbles down different tracks. Like any good building toy, it’s easy to learn and fun to master.

Buy Now $58