Build Your Own Perpetual Motion Marble Run. The Kit Contains 197 Snap-Fit And Link Pieces And A Motor-Driven Archimedes Screw. There'S No Need For Special Tools; Simply Unpack And Construct Using The Detailed Instructions. A Fantastic Stem Project.
Features
Great Stem Project That'S Loads Of Fun.Build Your Own Perpetual Motion Marble RunMotor-Driven Archimedes ScrewNo Special Tools Required
Specification
| Product Detail |
|---|
| Dimensions | 0.04x6.3x2.36 |
| Weight | 0.01 |
Warning - California Proposition 65
This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
