Marbles

Marbles, called Gravity Spheres by Ravesburger, are the main dynamic components of any Gravitrax run. The components of Gravitrax are designed for these marbles to travel through.

Function
Marbles roll through the track, hopefully making it to the end. They can interact with all components, and are relatively heavy for their size. There are four different colours of marbles: Silver (the normal color), Blue, Green and Red. Aside from their color, these marbles share the same

Some marbles are used as weights or counterbalances in components. For example, the hammer uses a slightly bigger marble as a weight, and four marbles are used to weigh down the catapult.

Obtaining
Marbles can be obtained from the following Gravitrax sets:


 * Starter Set - 3 Silver, 1 Red, 1 Blue, 1 Green
 * Starter Set XXL - 6 Silver, 1 Red, 1 Blue, 1 Green
 * Pro Starter Set Vertical - 3 Silver, 1 Red, 1 Blue, 1 Green
 * Magnetic Cannon Expansion - 3 marbles of unknown color

Marbles are included in the following Expansion sets, but are not meant to roll through marble runs. Instead, they are used in said extensions as weights, counterbalances, or moving parts.


 * Catapult Expansion - 4 Silver marbles
 * Hammer Expansion - 1 large Silver marble
 * Zipline Expansion - 1 large Silver marble
 * Lift Expansion - 7 Silver marbles
 * Bridges Expansion - 6 Silver marbles