Gravitrax Starter Set Instructions. To complete a challenge, you need to follow the instructions below andsuccessfully get the marble(s) from the launch pad to the landing. Discover how the laws of physics affect the journey your marble takes with curves, junctions, freefalls and even a cannon.
Combines 2 tracks into 1. With the gravitrax interactive track system, you can design and build your own marble runs and experiment with gravity, magnetism, and kinetics to propel your marble to the finish. Place 2 or 3 balls on the side of the magnet facing down the track.