Schools have been considered crucial social contexts for character formation. Hong Kong’s recent education policy has put moral and character education on the agenda of early childhood education (ECE); it states that moral and character education should be integrated into the major kindergarten subjects. However, questions remain on how it should be integrated into the ECE subject areas. Music has been officially identified as part of kindergartens’ daily activities. Scholarship has established the inextricable interconnection between character development and music participation. This study aims to explore subject-based implementation of the moral education through the lens of musical instructions. Literature confirms school leaders’ impact on shaping the implementation of policy, hence, school leaders’ perceptions and challenges regarding the implementation of this newly emphasized policy was explored through semi-structured interviews with 12 purposively selected principals. The results reveal that the principals valued using music education to teach children about morals and ethics, but found that they faced hurdles in the implementation, e.g. teachers’ insufficient pedagogical content knowledge and parents’ attitude. This study identifies traditionalism as the most prevailing view in kindergarten principals’ conceptualizations of moral education. Musical activities for moral education that principals support are play-based but adult-guided. © 2023 The Author(s).