The purpose of this study was to present preliminary data on sources of and exposure to pro- and anti-tobacco messages. A questionnaire was administered to 1130 Kenyan primary schoolchildren. Forty-seven percent had received risk information from broadcast media and 88% was exposed to tobacco advertisements. Nonsmokers held more favorable attitudes toward control policies and were less frequently exposed to pro-and anti-tobacco messages. Adolescents receive risk information mainly from the broadcast media. Advertising is an important risk factor of smoking status in this developing country.