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Introduce fun and thrilling addition to your child’s marble run tracks. The GraviTrax Pro Mixer combines and mixes up to three marbles and leaves kids hanging as to which sides these marbles will exit from. Combine this add-on accessory to the GraviTrax Starter Set (sold separately) to take it to the next level.

With the GraviTrax Pro Systems, children of all ages can test how high they can build. This STEM toy encourages kids of all levels to experiment with magnetism, gravity and kinetics as they propel their marble to the finish. Begin with the starter set and then expand the fun with accessories such as the GraviTrax Pro Mixer.