The Solarbotics GraviTrack Solar Marble Machine Kit SKU: 60415

The Solarbotics GraviTrack Solar Marble Machine Kit

$38.00 USD

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

In stock

$38.00 USD


The Solar version pulse-moves the elegant hand-off mechanism that passes marbles to the top of a sweeping multi-level track. You will witness the fascinating step-by-step action of the arms as the geometry changes periodically. Patience is rewarded with the plunk, and rollll of a successful motion cycle. The more light it gets, the more often it moves. It’s solar-powered stop-action motion!


  •     Intermediate skill level – ages 12+
  •     Soldering required
  •     Basic hand tools required (Phillips screwdriver, craft knife, wood glue)
  •     Soldering tools required
  •     No batteries included (or needed – it’s solar powered!)
  •     3 hour build time

Kit includes:

  •     1 x Set of laser-cut wood parts
  •     1 x GM3 Motor
  •     1 x 37x66mm solar cell
  •     SolarEngine circuit board & components
  •     1 x GMW Motor mount
  •     4 x 3/8″ steel marbles
  •     Assembly hardware

See the GraviTrack Battery


More Info

Weight 0.48 kg
Dimensions 23 × 13 × 3 cm


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