Beyond the convenience of bringing siblings to the same class, there are compelling educational reasons to mix ages during early childhood. The opportunity to observe many different models of musical expression is beneficial for both younger and older children. A mixed-age environment - where all students are free to respond and participate in their own way and on their own time - is also naturally inclusive for children with developmental differences.

The social-emotional learning opportunities abound in a mixed-age class. By pointing out and celebrating the musical responses we observe, the children gain awareness and appreciation of others. Babies are mesmerized by the toddlers' sounds and ability to move around freely, toddlers love to follow the leadership of the preschoolers, and older children love sharing their lyric ideas and dance moves. The three and four-year-olds' self-confidence blossoms as they take on leadership roles, master singing full songs, and help their teacher.