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.

Features:

• Sound-Reactive LEDs: Seven light boxes and 120+ patterns bring your build to life with music and motion.
• Expandable World Module: Connect with other ROKR sets to create a larger, linked marble city.
• Continuous Gear-Lift System: An automatic staircase keeps marbles running endlessly in a mesmerizing loop.
• Mechanical Art Design: Transparent tracks and synchronized gears blend engineering with beauty.

• Sound-Reactive LEDs: Seven light boxes and 120+ patterns bring your build to life with music and motion.
• Expandable World Module: Connect with other ROKR sets to create a larger, linked marble city.
• Continuous Gear-Lift System: An automatic staircase keeps marbles running endlessly in a mesmerizing loop.
• Mechanical Art Design: Transparent tracks and synchronized gears blend engineering with beauty.