Gravitrax Expansion Building which showcases more elaborate and

which showcases more elaborate and realistic designs

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

Get with the beat

the perfect explorer's tool

Gravitrax Expansion Building which showcases more elaborate andTake 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