Watch the night come alive with the National Geographic Glow-in-the-Dark Marble Run 50 piece set! This thrilling kit lets your creations shine bright in the dark, leading to hours of illuminating fun. The UV light keychain instantly charges the marbles, making them glow as they race through the twisty, turny tracks you build. With 41 snugly fitting construction parts and 8 glowing marbles, the paths you can create are only limited by your imagination! Pack everything away neatly in the included storage bag until your next exciting adventure into the nocturnal side of physics and motion.

• Spirals and bridges for exciting marble races
• UV light keychain to charge glow-in-the-dark marbles
• 41 secure-fit construction pieces for endless possibilities
• Learning guide included for a deeper understanding of physics
• Compatible with all National Geographic marble sets