Gravitrack marble machines by Solarbotics


Gravitrack is a fantastic new build-it-yourself desktop-scale marble machine kit from our friends at SolarBotics, and available now at our store.

Gravitrack is available in two versions: A no-soldering battery-powered version (shown above), or a soldering-required solar version. We also still carry the original SolarBotics Marble Machines, in battery and solar flavors.

6 thoughts on “Gravitrack marble machines by Solarbotics

  1. Does anybody know if there’s a formal design method that comes up with all those cool pivots and oddly shaped levers? In other words, transforming a rotational motion into a complex path…

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