Marble Roller Coaster by KiwiCo is a motorized tabletop coaster kit that lets kids build twisty tracks and a powered Ferris wheel to lift marbles, creating loop-the-loop and figure-eight layouts; the kit includes wooden building pieces, a motorized wheel, a battery pack, marbles, stickers and an illustrated guide; it teaches engineering and concepts like potential and kinetic energy while encouraging hands-on problem solving and creativity.