> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt

# Solarbotics GraviTrack Marble Machine Kit - Solar Edition

**Type:** Product page · **SKU:** CE05320 · **Brand:** [Solarbotics](https://core-electronics.com.au/brands/solarbotics-australia)
**Page:** https://core-electronics.com.au/solarbotics-gravitrack-marble-machine-kit-solar-edition.html ([markdown](https://core-electronics.com.au/solarbotics-gravitrack-marble-machine-kit-solar-edition.html.md))

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

## Pricing

- **Price:** $53.75 (inc GST) — $48.86 AUD, exc GST
- **Quantity discounts:** 6+ $47.40 (exc GST) · 12+ $46.42 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 2 today; more stock is typically available with a 7–13 day lead time.

## How to buy

- **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=CE05320:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart.
- **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/CE05320:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.)
- **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there.
- **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works)
- **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt
## Description

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!

**Specifications:**

- 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

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/6/0/60415-1.jpg)