Many of the most popular websites for kids contain advertisements for junk food, reports Reuters on a study in the latest American Journal of Public Health. One of the websites examined was PBSKids.org, which averages 9 million unique visitors per month. Lesli Rotenberg, s.v.p. of children’s media at PBS, noted that the site’s appearance in the study is “misleading,” as it does not accept advertising nor market food products to children. The site carries logos of PBS sponsors at the bottom of some pages, including McDonald’s and Chick-fil-A. Children never see images of food products, she said, adding that the Fizzy’s Lunch Lab and Don’t Buy It pages actually teach kids about healthy eating — and how to avoid media influences in their purchase decisions.