With Zoom Rails, standard sized glass marbles zoom down a triangular spiral array of wooden rails. Drop marbles through one at a time. Or line up a big collection of marbles and release them all at once and thrill to the rush and roar. The patented triangular design makes this an especially stable construction. This is a second marble run offering from Andrew Comfort, the inventor of Q-BA-MAZE. The inspiration is again from his grandpa's marble run, but this time with a focus on the long rails and marbles snaking and rolling down a single path. Read Less...