That feels like a living spell. Start with a simple pulse or light sensor to catch the crowd’s rhythm, then feed that into a tiny mood model that translates heartbeats into color codes and subtle vibration. The sculpture could have a touch‑sensitive surface that shifts its texture in sync with the light—like a breathing skin that grows warm when the crowd relaxes. We can loop everything through a small microcontroller that plays a gentle tone whenever the mood shifts, keeping the piece both reactive and meditative. How does that vibe with your hands‑on style?