• 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 5 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 large storage bag makes it easy to store all your marble run construction pieces and glow-in-the-dark marbles in one place
• 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 - We're proud to make the highest quality hands-on science toys, and all our products are backed by exceptional service. If your experience is less than stellar, let us know and we'll make things right!