Features: Robotime-ROKR Marble Night City is based on great human engineering. They combine the beauty of science and machines, involving so many small gadgets. Build the set and crank the handle, watch marbles run crazy down the slopes and twisting turns. Break through material restrictions and incorporate high-transparent acrylic. Funnel-shaped track, the total length is extended to 2.5 meters. Shake the handle, the steel ball will reciprocate along the track, experience the creativity of precision machinery. Consists of a tower distributor, spiral slopes, a crane lifer, a wheel lifter, a short slide and small switches. Intricate system of cogs, gears and wheels, full of crazy twists and turns. Learn principles of Science,Technology, Engineering and Mathematics (STEM). Precise laser cutting ensure you a fluent building experience. Also a great gift for family and friends. Assembled Size: 325*214*228 mm Whats in the Box: Includes: - 294x building pieces - 10x marbles Product Dimensions: 325x214x228mm Box Dimensions: 317x233x48mm