This study assessed knowledge, attitudes, and beliefs about nutrition, physical activity, and health risks related to childhood overweight among Women, Infants, and Children participants. Most (n = 165) were knowledgeable about causes/health risks of overweight (90%). The belief that "some people are born big or thin . . . " varied by education level (P < 0.05). Concerning activity, many (white non-Hispanic, 53%; African-American 69%) reported their children spending 2 to 3 hours per day watching television and playing video games, with 10% white non-Hispanic and 21% of African-American reporting 4 hours or more (P < 0.05). Beliefs related to the risk of overweight and activity level of the children differed among ethnic groups.