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or on-the-go sensory relief
Light-up shirt graphic enhances sensory engagement
they'll watch mesmerising materials move inside
Each sandwich combines two crisp
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GraviTrax Zipline Extension - Marble Run STEM Toy for Ages 8+ | Yellow Metal Vanilla or on-the-go sensory reliefGraviTrax Zipline Extension for Advanced Marble Run Construction Expand your GraviTrax or GraviTrax PRO marble run system with the Zipline extension. This component allows you to connect track sections across long distances and varying elevations, enabling the creation of new routes and complex trick shots. Designed for experimentation with gravity, this set adds dynamic action to your existing marble run. Key Features Benefits Connects track sections