NATIONAL GEOGRAPHIC Magnetic Marble Run - 150-Piece STEM Building Set for Kids & Adults with Magnetic Track & Trick Pieces & Marbles Herbs Measures (W x D x

Measures (W x D x H): 5/8" x 22" x 2 3/8" (each)

Why it's different: Waterproof

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In-unit ISO mixing

NATIONAL GEOGRAPHIC Magnetic Marble Run - 150-Piece STEM Building Set for Kids & Adults with Magnetic Track & Trick Pieces & Marbles Herbs Measures (W x D xWhy I love it: Buildable on any flat, vertical, magnetic surface, you can create very intricate and cool marble runs with this 150 piece kit. Brand: NATIONAL GEOGRAPHIC Features: A KICKSTARTER SUPERSTAR This patented marble racetrack is the most backed Kickstarter magnetic super puzzle of all time! Each track and trick has its own unique propertiesjust move them around to adjust or add exciting new pathways! DESIGN, BUILD, TEST, CREATE This wildly