The aim of this study was to investigate whether agility activity with dogs can be used to motivate less active children in physical activity and how such activity is experienced by parents and handlers. Data were collected through qualitative interviews with handlers and parents of the participating children. Agility with dogs appeared to motivate less active children to participate in, and endure, demanding physical activity. Joy and bonding with the dog appeared to be key elements in the motivational process. Motivation, initiation, and sustainment of activity over time are beneficial for children.