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National Geographic Glow-in-the-Dark Marble Run

Let your construction creativity run wild! 80-piece set includes construction pieces, 15 glow-in-the-dark marbles, and UV light keychain. Configurations are endless, allowing kids to build and re-build multiple marble runs as they play. Detailed learning guides inside teaches the science of gravity and motion.

41 marble run construction pieces, 8 glow-in-the-dark marbles, and a UV light keychain. Together equals the 50-piece count. Comes with a storage bag to keep all your pieces together. Compatible with all our other marble run sets so you can build even bigger. 8+ years.