NATIONAL GEOGRAPHIC Glowing Marble Run Expansion Pack with 5 Glow in The Dark Glass Marbles, 20 Construction Pieces, UV Light Key Chain, Great Creative STEM Toy for Girls and Boys

STURDY TIGHT FIT PIECES This expansion pack enhances your National Geographic marble run with 20 additional construction pieces, designed to fit together snuggly so your marble maze wont fall

EXPAND YOUR MARBLE RUN - This expansion pack (not a stand-alone marble run kit) enhances National Geographic Glow in the Dark Marble Runs (non-magnetic) with 20 additional construction pieces that fit snugly so your marble maze won’t fall apart: 9 tube pieces, 9 action pieces, and 2 base pieces. GLOW IN THE DARK MARBLES – add 5 new glow in the dark glass marbles to your collection and watch them shine bright as they zig-zag down the marble run. UV LIGHT – a UV light comes with the expansion pack to help give your marbles the ultimate glow. 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.