Marble Rush – interactive marble runs. Interactive marble run expansion set Marble Rush - Lights & Sounds Rocket expansion with 3 components, 1 sound and light module (electronic), and 3 MarBalls (marbles). The sound and light module with funnel reacts with funny sounds and light effects when the marbles roll into the funnel. It also plays cool music during playtime. 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.