This is a mechanical 3D wooden marble run puzzle for hands-on builders used during hobby assembly or STEM learning to solve the need for an interactive engineering-style project.
Source: https://www.robotimeonline.com/products/rokr-marble-explorer-swingback-wall-marble-run-lg503

| Variant | Price | Availability |
|---|---|---|
| Default Title | 39.99 USD | In Stock |
Is this a working marble run or just a display model?
It is a working marble run. After assembly, you can turn the crank and watch the steel balls move through the lift, rails, curves, and switch paths.
How long does it take to assemble?
The listed assembly time is about 6h. It is marked as a medium difficulty project.
What are the assembled dimensions?
The assembled size is H:10.0"(25.5cm), W:9.0"(22.9cm), D:8.0"(20.4cm).
What size are the steel balls?
The steel ball diameter is 11mm.
Is wax included in the package?
Wax may not be included due to customs policy. Ordinary candles, crayons, or beeswax can be used instead.