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. GLOW IN THE DARK MARBLES – The marble run kit includes 6 different colors of glow in the dark glass marbles that shine bright as they zig-zag down the marble run. Also Includes UV light to quickly recharge the marbles.

CONVENIENT STORAGE – A storage bag and marble pouch make it easy to store your marble run construction pieces and glow in the dark marbles in one place. Makes a great STEM gift for boys and girls! GREAT STEM TOY – The learning guide inside teaches about the physics of motion and aerodynamics. It also includes marble run construction experiments. HIGH-QUALITY EDUCATIONAL TOYS – National Geographic is proud to make the highest quality hands-on science toys, and all our products are backed by exceptional service.