National Geographic Magnetic Marble Run - 75-Piece

- This patented marble racetrack is the most backed Kickstarter magnetic super puzzle of all time! Each track and trick has its own unique properties - just move them around to adjust or add exciting new pathways!

- This wildly creative super puzzle includes 42 tracks & connectors, 17 trick pieces & 15 marbles for infinite building combinations and endless amounts of creative fun!

- This STEM marble maze for kids and adults can be built on any vertical magnetic surface like the fridge, lockers, whiteboards, workbenches & more!