Sexuality education is important for children's well-being, peer relationships and safety, yet pre-teenagers and their diverse experiences have remained largely overlooked within the field. In Finland, the national curriculum obliges schools to prevent sexual harassment and homo- and transphobic violence, to provide knowledge on gender diversity, and to support children and youth in developing their sexuality and gender identities. However, there are severe deficiencies in sexuality education that reinforce heteronormativity and leave pre-teenage children to cope with the pressures of normative cultures on their own. Drawing on our creative praxis with Northern-Finnish pre-teenage schoolchildren aged 10-13 years, we explore the ways in which pre-teenagers' knowledge of age, sexuality and gender, including their diversity, are negotiated and how pre-teenagers disseminate this knowledge to their peers. We also analyse pre-teenagers' political expression with respect to non-normative genders and sexualities via our arts-based Friendship Workshops. Based on our analysis, we discuss ways in which to develop sexuality education that takes into account pre-teenage children, their diversity, and their safety.