Detailed analyses of adult-infant interaction among some European and North American populations have revealed that it resides on characteristics such as synchronous timing, phrasing, pitch contours and variations of dynamic intensity that are essentially musical in nature. Moreover, this musicality of infancy is the medium which enables and supports the development of early communication. Observations of practice and interviews with 15 early childhood music practitioners in England suggested that a consensual version of practice has evolved around the collective rendering of playful songs and musical activities. However, this version of practice does not offer infant-appropriate musical experiences which might foster communicative musicality. The aim of the Music One-to-One project was to apply recent theories of infant musicality to practice. It was designed in three phases. A first stage gathered information from parents and practitioners about their current practices in music at home and in early childhood settings and their views and beliefs towards music. It was considered important to take account of what parents and practitioners already think and do if the designed approaches were to be relevant, accessible and practical. A second stage, moving through cycles of plan and review, explored practical approaches which blended what we had learned of parents' current practices, beliefs and views with the theories of infant musicality. Although the groups of participating parents were small, final interviews suggested that some elements of the musical activity had influenced parenting practices in the home. Finally, Stage Three of the project actively sought to provide bespoke materials and professional development for interested parties. (Contains 2 notes.)