To accomplish modality 2), displaying high and low data points according to geographical position, all data will be time-stamped and synchronized to the Geographic Positioning System (GPS). This will yield high insight into the impact of the environment on physical activity in this population. We will develop methodologies for data and device synchronization. These methodologies may enable the turning on and off of key sensing devices after a particular event has occurred (e.g. GPS data is interpreted and it is observed that a child has moved into a playground or a convenience store - certain sensing devices are turned on or off, or sample at a higher rate). This data will reveal where children are more active, where they are sedentary and where they are experiencing stress. Finally, the web interface will be equipped to signal health practitioners when average values fall above or below prescribed health guidelines.