Foregrounding the primary school as a key cultural arena for the production and reproduction of sexuality and sexual identities, this article goes some way to addressing what are absent from many sociological portrayals of young children and schooling. Drawing on data derived from an ethnographic exploration into children’s gender and sexual identities during their final year of primary school, the article examines how dominant notions of heterosexuality underscore much of children’s identity work and peer relationships. The article further illustrates how boys and girls are each subject to the pressures of compulsoy heterosexuality, where to be a ‘normal’ girl or boy involves the projection of a coherent and abiding heterosexual self. The implications of recognising children’s sexual cultures and the pressures to conform to a heterosexual culture are discussed briefly in the concluding section.