This paper investigates (1) whether the physical attractiveness stereotype applies to children, (2) whether children's self-perception is influenced by the attractiveness of an advertising model, (3) whether children's attitudes towards an ad and buying intentions for a non-beauty related product are influenced by the attractiveness of an advertising model, and (4) whether age affects (1), (2) and (3). Results of two experimental studies with respectively 8-9 year old (N = 75) and 12-13 year old (N = 57) girls and boys confirm the presence of the physical attractiveness stereotype in children. The presence of a moderately attractive (versus less attractive) model has a negative influence on general self-worth for 8-9 year old boys, but not for girls, nor for 12-13 year old children. Exposure to a moderately attractive (versus less attractive) model also has a positive influence on perceived physical appearance of 8-9 year old girls, but this effect does not occur for boys, nor for 12-13 year olds. The studies also show that moderately attractive (versus less attractive) models increase attitudes and buying intentions for 8-9 year olds, but not for 12-13 year old boys and girls.