The Solarbotics GraviTrack Battery Marble Machine Kit

Posted By Solarbotics

Aug 30th 2017

Our GraviTrack Marble Machine Kit (SKU 60410) is our newest addition to the Marble-Drop mechanism family. Elegant, swooping hands pass marbles to each other to the top of a sweeping multi-level track. A switched battery pack smoothly exercises the mechanism. The smooth pick/hand-off/place motion is hypnotic and enchanting. No soldering is necessary.

Measuring approximately twice as wide as our original Solar or Battery Marble machine kits (at 250 x 127 x 140mm, or 10" x 5" x 5.5"), the GraviTrack is still desk-top compact but large enough for easy mechanical assembly.

Price - $33.00 USD


Easy wood construction

Slot and tab construction with laser-labelled parts makes assembly easy.

Pre-wired motor & battery-pack assembly

The power unit is pre-assembled for your convenience - no soldering required. The dual-AAA battery pack with switch tucks neatly behind the linkage, providing hours of action at your command.

Precision laser-cut wood frame

Being laser-cut from engineered medium-density fiber board ensures dimensional accuracy and easy construction.

Successful project guarantee

Don't fret if a piece gets lost or damaged - our Successful Project Guarantee means we've got your back. You bring the effort & tools, and we'll make sure you have everything else.


  • Beginner skill level - ages 12+
  • Basic hand tools required (Phillips screwdriver, craft knife, wood glue)
  • 2 x AAA batteries required (not included)
  • 2 hour build time

Kit includes

  • 1 x Set of laser-cut wood parts
  • 1 x GM3 Motor + battery pack
  • 1 x GMW Motor mount
  • 4 x 3/8" steel marbles
  • Assembly hardware

See also the GraviTrack Solar





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