We will provide this intervention using regular YMCA staff and use the regular time periods for PA that exist in the YMCA after school programs. We will also use the regular YMCA staff to provide snacks. 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").