I Built the Longest Trampoline Marble Run

I didn’t think this many trampolines would work, lol See the full video of 121 GraviTrax trampolines! What a marble run!

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Follow the rest of this piece over at: Gravitrax.trek.pub (Read More). Gravitrax is a very fun marble run board game, the website is dedicated to that.

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Marbles in Lego bridge

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