National Geographic 50 Pieces Glow-In-The-Dark Marble Run
Race glow-in-the-dark marbles down a twisting, turning marble run!
Also included is a detailed learning guide which teaches the physics of motion and gravity.
- 41 Construction Pieces
- 8 Glow-in-the-Dark Marbles
- 1 UV Light Keychain
- 1 Storage Bag
- 1 Learning Guide with Instructions