NATIONAL GEOGRAPHIC™ Glow-in-the-Dark Marble Run, 50-Piece, RTNGMRGID50

Build a twisting, turning marble run and race incredible glow-in-the-dark marbles!|This 50 piece set has 41 construction pieces, 8 marbles, a UV keychain light, and a mesh storage bag. Everything you need!|Learn about motion and gravity in the detailed learning guide.|Experiment with different marble run builds to make your marbles race faster or slower. The fun never ends!

FEATURES

• Explore the world of engineering, 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