A unique, open-ended marble-run building experience Watching them go is like magic in slow-mo The paths cut out of each track widen gradually to propel the marbles forward with mesmerizing grace great for ages 8 and up High-quality materials and design - pieces fit easily into place Encourages spatial reasoning, creativity, engineering skills, problem-solving, critical thinking choose the 43-piece, 73-piece, or 124-piece set All sets are fully compatible with each other
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Item# : SPM16331805624
Model # : 1