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I’m reviewing over 70 GraviTrax add-ons from 7 Etsy shops. In this episode, I review add-ons from ZummZumm. Add to your … source

A new GraviTrax trick you’ve never seen before! Launch marbles from the GraviTrax Spinner without touching it. The Spinner … source

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Here’s a small marble run in red, white, and blue marbles, for Veterans’ Day this week in the USA . Be sure to thank our … source

How long can we build a GraviTrax marble run? Could this be the longest GraviTrax marble run in the world? Does this marble … source

Preview of a marble run computer I built using the GraviTrax marble run system by Ravensburger. The computer can add two … source

Serious fun with the best 3D-printed Gravitrax-compatible extensions! In this episode, we explore two very fun 3D-printed add-ons … source

Marble run satisfying slo motion trampoline bounce. It’s so relaxing! source

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