The industrial partner, Digido, is interested in developing and marketing exercise games targeted at children that leverage the increased prevalence of  smartphones and their sensing and computational capacity, including: their ability to detect activity levels; their increasing use as a gaming platform; and their integration with social media and online communities. However, current activity sensing and classification techniques are too limiting for use in smartphone-based exergames for children. This project will combine sophisticated signal analysis and classification techniques with game design to produce pairs of robust, accurate and reliable sensor-input-game-mechanic dyads to produce an activity sensing input library for children’s smartphone exergames.