Escalating concern over childhood obesity rates, children’s eating habits and their physical activity regimes has fuelled the development of multiple health policies and resources. Many of these are reaching into primary schools, contouring pedagogical opportunities and influencing how young people may come to understand themselves as healthy (or not). In this paper, we map the health policy/resource context in New Zealand emergent over the past two decades, examining the form and content of health messages circulating and their incursions into primary school environments. We also consider the potential effects for teachers and students of enduring health ‘invasions’ in the primary school space.