The relation between fathers' participation in family work (child care and home chores) and children's sex-role attitudes was examined in an interview study of 160 Caucasian middle-class families. Children were stratified by age level (5-year-olds and 10-year-olds), sex, and maternal employment status. 5 types of paternal participation were assessed--for example, total interaction time, performance of traditionally feminine home chores--using joint estimates by fathers and mothers. Children's attitudes were measured by questionnaire; their occupational aspirations were also assessed. Data are provided on the extent of fathers' participation for each of the 5 types assessed. The direct effects of paternal participation per se on children's attitudes were weak. Among fourth graders, mother's attitude toward the male role was the strongest predictor of stereotyping; children with nontraditional mothers were significantly less stereotyped.