Communicative and social capacities are known to be of primary developmental importance to all children and often present a particular difficulty for children with neurodevelopmental disorders. A recurring challenge for teachers is achieving effective communication with children who span developmental diversity (e.g. inclusive settings or those with a range of special needs) while using practical strategies that feel manageable to the teachers themselves. Music, a powerful affective medium, is appealing to all children and has the inherent flexibility to reach differing individuals. Thus, it is especially valuable for children with autism and other special needs. However, teachers without musical training may miss a great deal of music's potential benefits. The author describes an affective singing technique that, while grounded in vocal practice and music theory, uses an overt focus upon vowels--vowels being known conveyors of emotion in sounded communication. This natural port of entry offers non-musician teachers a simple and accessible way to incorporate live singing into daily activities that opens space for two-way affective communication, a crucial component of social development. Key concepts in this paper are elucidated by childhood instructional and play scenarios and graphics. The discussion is supported by published behavioral and imaging research.