The cool thing is, kids are building horizontal structures to make marbles move, so the key (and satisfaction) involves how to position the holes in the blocks. They must use their noggins! Our Basic Set of 49 pieces includes blocks, rails and a twist. Comes with 50 marbles and a terrific instruction book. For ages 4 and up. WARNING CHOKING HAZARD (1) Not for under 3 yrs.
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