National Geographic Glow-in-the-Dark Marble Run for Kids Ages 8-12 | 15 Glow-in-the-Dark Glass Marbles, Storage Bag, Construction Toy, STEM Building Project, Birthday Gift

STURDY TIGHT-FIT PIECES – This construction kit is designed to fit together snuggly so your marble maze won’t fall apart while you play. With 5 sturdy bases, 15 exciting action pieces, and 45 clear smooth-run track pieces, our kit has countless imaginative configurations.