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Solarbotics GraviTrack Marble Machine Kit - Solar Edition

SKU: CE05320

$65.00 AUD, inc GST
$59.09 AUD, exc GST
Solarbotics GraviTrack Marble Machine Kit - Solar Edition
65 AUD

SKU: CE05320

$65.00 AUD, inc GST
$59.09 AUD, exc GST
3 reviews 0 5 5


  • $6.95 Standard (2-4 days, tracked)
  • $9.95 Express (Overnight*, tracked)
  • $3 Economy Post* (3-7 days, no tracking)
  • FREE Pickup (Newcastle only)

Shipping costs may increase for heavy products or large orders.

Exact shipping can be calculated on the view cart page.

*Conditions apply, see shipping tab below.

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

This product is listed in:

Documentation and Resources:

Product Comments

Customer Reviews

  1. Review by Alan verified purchaser

    Well made and works well.
    Fairly delicate structure - I have put mine in a plastic display case. (also stops the loss of the odd marble)
    I like it :} (Posted on 27/02/2019)

  2. Review by Peter verified purchaser

    This is another great product from Solarbotics. I love the simplicity of the solar design and the marble race to produce a motion. (Posted on 28/12/2017)

  3. Review by Ray verified purchaser

    Great little kit from Solarbotics, the second one I've built. Clear instructions, with only one "but". The emphasis on correct polarity is welcome, but in my case the motor connections were reversed. Maybe a factory gremlin. A quick swap and away it went, in the right direction. (Posted on 14/12/2017)

Exact shipping can be calculated on the view cart page (no login required).

We deliver Australia-wide with these options:

  • $3 for Small Items (3-7 days, not tracked, only available on selected small items)
  • $6.95 for Standard Post (2-4 days, tracked)
  • $9.95 for Express Post (Overnight for most of Australia, 2+ days for rural, tracked)
  • Pickup - Free! Only available to customers who live in the Newcastle region (only after we email you to notify your order is ready)

International Orders - the following rates are for New Zealand and will vary for other countries:

  • $11.49 for Pack and Track (3+ days, tracked)
  • $16.50 for Express International (2-5 days, tracked)

If you order lots of gear, the postage amount might increment based on the weight of your order.

Our physical address (here's a PDF which includes other key business details):

Unit 18, 132 Garden Grove Parade
NSW, 2289

Take a look at our customer service page if you have other questions such as "do we do purchase orders" (yes!) or "are prices GST inclusive" (yes they are!). We're here to help - get in touch with us to talk shop.

Have a product question? We're here to help!