A versatile, 122-piece marble run Starter Set that invites kids to design, build and test action-packed tracks while exploring gravity and basic physics. Includes 9 build plans and all the pieces needed to create curves, junctions, freefalls and tricks — from metal marbles and sturdy 12" card bases to height tiles, switches, a vortex, launcher and a Magnetic Cannon for dramatic effects. Easy to connect and fully expandable, this electronic-free building system encourages open-ended play, hands-on STEM learning, and repeated experimentation as players refine track layouts to race marbles, preserve momentum and perform stunt moves. Ideal for solo builders or family play, the set provides durable components, clear instructions, and countless layout possibilities for imaginative, problem-solving fun.