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Dip down from one level to the next!
GraviTrax is a unique marble-run system featuring hexagonal risers and track tiles that simply fit and stack together, rail tracks that hook into place, and stunt pieces that add exhilarating action.
One marble acts as a weight while the bucket waits at the top for another marble to come rolling in. Once it does, it swings down, drops it onto the lower track, and then swings back up to collect another.