Research consistently shows that time spent outdoors is a strong predictor of children's physical activity and that there is an association between physical activity and access to parks and recreation areas. In addition to providing places to play and be active, parks are also neighborhood destinations that may provide near-by residents a place to walk/bike/skate. This study will gather information from approximately 25 neighborhood parks in Durham, NC to determine the relationship between specific elements (e.g. play equipment, tennis courts, etc.) within neighborhood parks and children's physical activity. Researchers will assess the contribution of neighborhood park characteristics in explaining children's physical activity in parks. They will determine how neighborhood environments are related to the extent of children's use of parks for physical activity. They will also assess the importance of parent and adult supervision on children's use of parks for physical activity. Finally, researchers will determine whether the extent of park use and children's physical activity differs by race/ethnicity, socioeconomic status, and gender.