Big Fin Sin Fin is an experiential light and sound installation based on the original Fin Sin Fin sculpture. It merges sculpture, interactivity, and performance into a flowing, walk-in environment that unfolds like an immersive journey into the idea of infinity—where every end becomes a new beginning. Built from modular, light-reactive aluminium panels, the structure forms a puzzle-like 3D system that can expand infinitely, symbolizing cycles of connection, repetition, and transformation. In darkness, visitors engage with the piece using UV torches and laser pens, painting glowing traces onto its surface and becoming co-creators in a living light performance. Choreographed blue light sequences and layered soundscapes alternate with silence and shadow, intensifying the immersive atmosphere. Big Fin Sin Fin invites reflection, play, and a deep sense of continuity in a space where beginnings and endings dissolve.