Evidence from national studies in developed and developing countries suggests that girls spend more time on housework. The most common explanation relates to behaviour modelling as a mechanism of gender role reproduction: children form habits based on parental models. This brief shows that participation in household chores is an essential part of children’s lives. There is a common pattern of a gender gap between boys’ and girls’ daily participation in housework across a diverse range of socio-economic and cultural contexts in 12 high-income countries. The persistence of this gap points to gender stereotyping – a form of gender role reproduction within a family that potentially can reinforce inequalities over the life-course.