There is an epidemic rise in the number of overweight and obese children. Overweight and obesity in children tracks into adulthood and carries elevated risk of chronic diseases such as seen with the metabolic syndrome (i.e., elevated glucose, hypertension, etc.). Low levels of PA and poor nutrition seem to be tightly linked to the increase in overweight and obesity. A minimal intervention that targets simple strategies for both sides of the energy balance equation may diminish overweight and obesity. Increasing moderate to vigorous physical activity and improving nutrition through snacks is a feasible, low cost strategy and can be disseminated nationally through the YMCA, if successful. Specifically, we expect that children receiving YMCA PAN will show smaller changes in BMI after 3 years of the intervention when compared to children not receiving YMCA PAN (i.e. standard, existing YMCA After School Program or "YMCA standard care").