This document proposes a hand-held fitness tracking device in the form of a virtual pet to motivate teenage girls ages 13 to 18 to exercise more. The device aims to encourage opportunistic physical activity and provide awareness of activity levels while supporting social interactions. It addresses issues such as female youth being unmotivated to exercise and less active than males, as well as using unhealthy weight loss techniques. The proposed device incorporates exercise into daily activities and school PE lessons, and provides feedback on progress through easy accessibility, self-monitoring abilities, and social features. Potential criticisms include limited appeal to older teenagers and being a short-lived novelty.