An engaging introduction to the fascinating world of elementary particles and their “quantum life,” highlighting their effects and technological applications. The session features an interactive demonstration of the Cosmic Piano, an innovative outreach instrument that detects muons from cosmic rays and transforms them into musical notes and flashes of light. Presented at events such as the Montreux Jazz Festival and the EuroScience Open Forum, the project merges science and art to bring particle physics closer to audiences through a playful and educational experience.