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National Geographic Marble...
The National Geographic 115-Piece Glow-in-the-Dark Marble Run Construction Set has everything kids need to create incredible marble runs that will have their glowing marbles racing toward the finish line! Configure the pieces in any design you’d like - the possibilities are endless! The detailed learning guide has lots of information about the physics of motion and gravity, so kids can learn while they play!
Suitable for ages 8+ years