GraviTrax Balls and Spinner - Marble run accessories Decals It is an exciting device

It is an exciting device with a smart mechanism inside

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4V 320mAh Lithium Ion Battery W/ Balance Plug

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Featuring aerodynamic enhancements like bulging over fenders and a rear wing

GraviTrax Balls and Spinner - Marble run accessories Decals It is an exciting deviceLaunch more marbles with the GraviTrax Balls & Spinner and up the odds on your races! Race up to 6 marbles at once with the GraviTrax Balls & Spinner?! A quick turn sends the marbles down your amazing marble run in a race to the finish. Since all sets are open ended, it's a snap to combine accessories like the Spinner with any GraviTrax Starter Set? to create unique action in your marble runs. Combine with the laun