4 years and up. Children will have many hours of fun with this exciting Mega Marble Run! The marbles will disappear inside the columns, roll down the assorted chutes, spin through the paddle wheels, and ring the bell on the wiggly chute. Construction set includes: 3 paddle wheels, 3 vortex, a wiggly bell chute, staircase, 180 degree turn, 2-way chute, and other various pieces. Create simple or complex marble runs with the colorful slot-together plastic pieces.