Ages: 14+

Build a futuristic marble city that glows with life. The ROKR Alchemy City features sound-reactive LED lights, an automatic gear-lift system, and modular design for endless motion and creativity.

Build a glowing mechanical city where marbles race through shimmering towers and mirrored bridges. Gears turn, lifts rise, and lights react to every sound, transforming each run into a hypnotic show of motion and color. With its futuristic design and seamless gear system, Alchemy City is both a challenge to build and a spectacle to behold — a kinetic skyline powered by your own hands.