Gravitrax Expansion Building The sound is produced by

The sound is produced by a hand-turned wheel rubbing against the strings

which showcases more elaborate and realistic designs

Detachable & adjustable strap Metal top handle Drawstring closure Dimension: 6

the perfect explorer's tool

Gravitrax Expansion Building The sound is produced byTake your track to new heights with the GraviTrax Building Expansion set! The Building Expansion offers over 25 additional elements to expand your track vertically. Youll increase the action when increasing the height of your run. Experiment with the combination of height tiles, base plates, freefalls, switches and even another level. See how high you can build your track before getting the marbles to the finish. GraviTrax Starter Set required What