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Solarbotics GraviTrack Solar Marble Machine

Product Code: 60415
Excl. VAT: £35.95 Incl. VAT: £43.14
You will earn 35 Robo Points for buying this product

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 roll of a successful motion cycle. The more light it gets, the more often it moves. It's solar-powered stop-action motion!

Solarbotics GraviTrack Marble Machine Kit is their newest addition to the Marble-Drop mechanism family


  •     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

Whenever possible, items which are in stock are dispatched the same day, or the next working day.

Large and/or heavy items are dispatched by UPS courier service and these orders must be placed before 15:00hrs (GMT) to ensure same day dispatch.

Small items are normally sent using a Royal Mail service for UK orders, and International Airmail or UPS for overseas orders

Returns Policy

Solarbotics GraviTrack Solar Marble Machine



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