Gravitrax Expansion - Building Surprise Box Your child will spend hours

Your child will spend hours watching the spools roll down to the bottom until they ring the little bell

and crystallization

Rainbow rocket is true to its name

Learn how the elastic material stores energy and then releases it to move the models

they are ergonomic for everyone

Gravitrax Expansion - Building Surprise Box Your child will spend hoursTake 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. Ages 8