Propel the marble through your run by adding the GraviTrax® Hammer. When triggered, the hammer swings down and hits the marble, giving it momentum to send it on its way. This accessory also includes 6 additional track pieces.
GraviTrax® Starter-Set required
GraviTrax® is an open-ended building concept offers endless possibilities to design a different track every time you play. Add flair and speed to your tracks with expansion sets and action accessories. Experience the power of gravity with your own GraviTrax® marble run.