In this chapter I argue that specific valuable educational qualities can be developed through free group improvisation in general music education. My claims are operationalised through a set of research questions to investigate students’ actions, and characteristics as well as implications of these actions in improvisation events. John Dewey’s theory of aesthetic experience, and more specifically an experience, is employed as analytical lens in analysis of children’s improvisations. I argue that an experience in improvisation occurs in and through a reciprocal interaction with the environment which means that when children improvise, they change due to their musical experiences but they also in turn change their musical environment. Crucially, I argue that having an experience in free group improvisation can cultivate Expressiveness, Agency and Responsiveness.