> **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 - Battery Edition

**Type:** Product page · **SKU:** CE05195 · **Brand:** [Solarbotics](https://core-electronics.com.au/brands/solarbotics-australia)
**Page:** https://core-electronics.com.au/solarbotics-gravitrack-marble-machine-kit-battery-edition.html ([markdown](https://core-electronics.com.au/solarbotics-gravitrack-marble-machine-kit-battery-edition.html.md))

Construct your own hypnotic marble-coaster with this superb Solarbotics kit. Watch as the marbles are cycled through synchronised mechanical arms using nothing more than laser-cut wood and a single motor.

## Pricing

- **Price:** $46.75 (inc GST) — $42.50 AUD, exc GST
- **Quantity discounts:** 10+ $41.23 (exc GST) · 25+ $40.37 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 6 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=CE05195:1` (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/CE05195:1.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

Construct your own hypnotic marble-coaster with this superb Solarbotics kit. Watch as the marbles are cycled through synchronised mechanical arms using nothing more than laser-cut wood and a single motor. There's no soldering, programming or microcontrollers involved, just a clever design which makes for the perfect desktop gadget.

## Specs:

- 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
 
## 
**What's in the Kit:**

- 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

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/6/0/60410-1.jpg)