Studies indicate that adults living in places with traditional urban attributes report higher rates of walking/cycling for non-recreational purposes. It might be assumed that living in an urban environment has a positive effect on children’s non-recreational physical activity levels as well. However, in contrast, data suggests that urban children have higher rates of overweight. The proposed study will provide new information about the influences on child physical activity levels by focusing on non-recreational activity, such as walking or biking to/from school, in children aged 5 to 10 years. This study will look at physical activity levels among predominantly African American and Hispanic children who live in the urban area of South side Chicago. It will examine the built environment in the children’s home and school community, the safety environment in the home and school community and the relationship between physical activity level and Body Mass Index (BMI).