National Geographic Glowing Marble Run - 250 Piece Construction Set with 50 Glow in the Dark Glass Marbles, Mesh Storage Bag, Great Creative STEM Toy for Girls and Boys

STURDY TIGHT-FIT PIECES - This construction kit fits together snuggly, so your marble maze won’t fall apart while you play. With 10 sturdy bases, 55 action pieces, and 135 smooth-run tube pieces. This 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 makes it easy to store your marble run construction pieces and glow in the dark marbles in one place. GREAT STEM TOY - The included Learning Guide inside teaches about the physics of motion and aerodynamics. It also includes marble run construction experiments! AWARD-WINNING PRODUCTS - Blue Marble, winner of the Toy Association's prestigious Toy of the Year Award, proudly develops products that foster education, imagination, and creativity, with a U.S. support team to ensure a stellar experience!, Manufacturer: JMW Sales, Inc.