The relationship between new technology and learning is gaining increasing relevance in the field of music education (Webster, 2002; Folkestad et al., 1998). However, only a few studies have considered the nature of the interaction between children and musical machines. This article describes an observation study of children aged 3–5 years confronting a particular interactive musical system, the Continuator, which is able to produce music in the same style as a human playing the keyboard (Pachet, 2003). The analysis of two case studies suggests that the Continuator is able to develop interesting child/machine interactions and creative musical processes in young children. It was possible to observe a ‘life cycle’ of interaction, as well as micro-processes similar to those observed in child/adult interactions (Stern, 1985; Imberty, 2002). The ability of the system to attract and hold the attention of children has been interpreted through Csikszentmihalyi's (1990) ‘flow theory’.