Marble Rush - interactive marble run. Marble Rush interactive marble run extension set - motorised Ferris wheel extension with 2 components, 1 motorised Ferris wheel (electronic) and 3 MarBalls (marbles). The motorised Ferris wheel automatically picks up the balls and transports them to the next level. Building and playing with the marble run encourages motor skills, creativity, spatial thinking and understanding of the principle of cause and effect. Compatible with all Marble Rush sets to build huge marble run worlds. Childproof battery compartment and automatic switch-off. Demo batteries are included.