The Princess Galyani Vadhana Institute of Music Youth Orchestra, PYO, is a vibrant musical ecosystem that promotes youth empowerment and cultural exchange. This study explores an interdisciplinary methodology that bridges organisational anthropology and a theory-of-change framework, aligned with the Sustainable Development Goals (SDGs). The assessment examined PYO’s development from 2013 to 2024. Quantitative data from PYO’s records show 69 performances, 41 workshops, 18 large-scale events, and engagement with over 1,000 youth participants. Qualitative findings reveal a family-like culture where creativity blossoms and a profound sense of belonging is cultivated. Cross-generational exchanges between young musicians and parents promote social inclusion and education, reinforcing PYO’s role as a creative community hub. The results reveal that PYO is a living model of a sustainable orchestra that empowers youth and bridges communities through music. Ultimately, PYO’s journey highlights how diverse voices can unite in harmony, transforming a youth orchestra into a wonderland, a powerful vehicle where diversity thrives through shared learning, inspiration, and unity.