Action and sound components open up many possibilities and even more exciting track layouts. On their rapid descent, the steel balls make the sound tubes resonate with melodic tones. The balls reach the next track in a completely new way through the funnel. They shoot and jump through tight 90° curves and a switch in the course. Once at the bottom, the balls are lifted back up by the manually operated chain lift. With the Dynamic M construction set, four exciting marble runs can be built. It includes a funnel, 3 sound tubes, a switch, 5 90° curves, a magnetic holder, 8 balls, 4 90° flexible tracks, and 14 180° flexible tracks. Ideal additions: All construction sets from the Dynamic line, Motor Set XS, Sound+Lights, LED Set.