The National Geographic 90-Piece Makeway Magnetic Marble Run STEM Building Set brings a new level of excitement to building a marble maze! With its innovative magnetic connectors, kids and adults alike can build, create and explore engineering on any magnetic surface. This marble run set provides everything you need: 31 magnetic connectors; 28 track pieces; 9 trick pieces – funnel, pole, fork, 2 spinners, bell, flip, switch & catapult; 20 marbles; Storage bag; Detailed instructions & fact-filled Learning Guide. From the kitchen to the office, this engineering kit has a Rube Goldberg machine style of play that’s fun and satisfying. Magnetic connectors work in tandem with the track and trick pieces for endless combinations on any magnetic surface. The connectors are sturdy yet easy to move around, eliminating frustration for younger users as they build and fine-tune their track. Its unique design also means less clutter on the floor, with a handy, durable storage bag to keep all your pieces and marbles safe and secure. Explore physics and engineering with the six different types of tracks and six trick pieces, creating astonishing chain reactions and intricate paths for your marbles! And like all National Geographic STEM kits, the 90-Piece Magnetic Marble Run includes a detailed, illustrated Learning Guide to teach the science behind all the fun. Learn how to think like an engineer with an understanding of Newton’s laws of motion, gravity, energy and more! Order the National Geographic 90-Piece Magnetic Marble Run today, and experience the kinetic fun of this one-of-a-kind STEM building set! 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.