The chapter defines the promise and possibilities of twenty-first-century digital musicianship, with musical creativity and engagement at the core of music education via the use of mobile devices. Through the intentional use of iPads, tablets, or other hand-held devices, students are presented with myriad ways to create, perform, listen to, and respond to music. The authors discuss the turnaround in their own thinking about mobile devices, their conceptions of creative musicking, and the changes in their pedagogical approaches to a more inclusive, constructivist, and informal approach to teaching with and through mobile technology. They explore the enormous potential of rather small technological devices to transform the music-making experiences of students of any age.