The National Geographic Glow in the Dark Marble Run is a phenomenal construction activity kit for children! This 50-piece kit is compatible with all other National Geographic marble run sets and includes 41 construction pieces, 8 marbles, a UV light keychain, a storage bag, a learning guide, and marble run construction experiments. This set has everything you need to build and rebuild endless incredible marble runs that will have your glowing marbles racing toward the finish line! Building countless imaginative configurations is super fun and simple with the 41 clear smooth-run track pieces that fit firmly together to ensure that your mazes won't fall apart during play. The 8 unique glow-in-the-dark glass marbles create magic as they shine bright on their zig-zag trail down the marble run. You can quickly charge the marbles with the included UV light keychain for mega brightness with each race. When playtime is over, you can conveniently store all of the pieces in the storage bag in order to protect them from getting lost and have easy access to all of the parts you need for the next time you plan to build.

• 50-piece set compatible with all other National Geographic marble run sets, 1.46 lb
• UV light keychain quickly charges marbles for extreme brightness
• This kit includes: 8 real glass marbles that glow in the dark, a UV keychain light to help your marbles glow brighter and hold that lasting glow longer, 25 smooth-run tube pieces, 9 securely fitting action pieces, 6 sturdy bases for a stable foundation and a handy drawstring storage bag.
• 41 clear smooth-run track pieces that fit firmly together
• 8 glow-in-the-dark glass marbles shine bright as they zig-zag down the run
• Build and rebuild countless imaginative configurations