Valentin is seven and a half. The day he starts second grade, his teacher gives the class an assignment: talk about what your parents do for a living. When Valentin says his mom's the mayor (of the city) and his father is a stay-at-home dad, everyone laughs. Valentin is embarrassed. So he suggests an experiment to his parents: swap roles for just one day. A clever book that helps children tackle the preconceptions of male and female jobs and the sexism embedded in language.