مجموعة بناء مكونة من 250 قطعة

The National Geographic Glow in the Dark Marble Run is a phenomenal construction activity kit for kids!This 250-piece set has everything you need to create incredible marble runs that will have your glowing marbles racing toward the finish line!This Kit Includes:- 50 Glow-in-the-Dark Marbles- 1 UV keychain light to help your marbles glow brighter, longer- 135 Smooth-run tube pieces- 55 Action pieces that fit securely together, so you can be sure that your marble run maze won?t fall apart when you play- 10 sturdy bases to build a stable structure- 1 Storage Bag- 1 Learning Guide with InstructionsConfigure the pieces in any design you?d like - the possibilities are endless!A detailed learning guide has lots of information about the physics of motion and gravity, so you can learn while you play! And when you?re all done, a convenient mesh storage bag is included so you can keep all your marble run pieces stored together.National Geographic Toys makes the highest quality hands-on science toys, and all products are backed by exceptional service.About the National Geographic Society: With a mission to inspire people to care about the planet, the National Geographic Society is one of the world's largest nonprofit scientific and educational organizations.