The Solarbotics GraviTrack Battery Marble Machine Kit SKU: 60410

The Solarbotics GraviTrack Battery Marble Machine Kit

$33.00 USD

Our GraviTrack Marble Machine Kit is our newest addition to the Marble-Drop mechanism family.

In stock

$33.00 USD


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.


  •     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 the GraviTrack Solar


More Info

Weight 0.48 kg
Dimensions 23 × 13 × 3 cm


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