Most cultures carry an idea of music being connected to emotion. New research suggests that we may also acquire emotion knowledge from our music experiences. This article investigates music experience as a mediating tool for emotion knowledge in early childhood, as revealed through qualitative interviews of adults. The interviewees describe music experiences from their early childhood or adult experiences together with young children. They also reflect upon the experiences, relating them to emotion knowledge and early childhood learning cultures. Thus, the article has a hermeneutic-phenomenological approach, and the analysis is mainly a content analysis. The results are discussed in relation to learning and learning cultures, but also in relation to music therapy and emotion psychology. The article reveals implications for early childhood learning cultures in pointing towards the importance of the relationship between caregiver and child, and of music as a mediating tool for emotion availability and interaction.