You'll be amazed as you watch glowing marbles race down the 50-piece National Geographic Glow-in-the-Dark Marble Run! This set comes with 41 construction pieces that fit snugly together, 8 glow-in-the-dark marbles, a storage bag for all your pieces, and a UV light keychain so your marbles shine bright as they zig-zag down the marble run. A full-color learning guide inside teaches about the physics of motion and gravity. There are countless configurations kids can build with this set, meaning play will last for hours and hours!• Contains: Does Not Contain Any of the 9 Major Allergens • Suggested Age: 8 Years and Up • CPSC Choking Hazard Warnings: Choking_hazard_contains_a_marble • Educational Focus: Engineering, Science, Physics • Includes: Activity Guide, Storage Bag • Battery: 1 CR2032 Lithium, Optional, Included

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National Geographic Glow-in-the-Dark Marble Run - 50pc