Marble Rush – interactive marble runs. Interactive marble run set - Fun Fair Set M300 E with 24 components, 2 motorized Ferris wheels, and 5 MarBalls. The motorized Ferris wheels automatically pick up the marbles and transport them to the next level. Countless assembly options and pathways with curves, tunnels, ramps, etc. Building and playing with the marble run promotes motor skills, creativity, spatial thinking, and understanding of the principle of cause and effect. Compatible with all Marble Rush sets to create huge marble run worlds. Child-safe battery compartment and automatic shut-off. Demo batteries are included.