Our work brings together theories and methodologies from public health and the learning sciences to develop a culturally relevant community-based intervention aimed at promoting healthy childhood development. We present our approach to personalising a community-based family intervention to prevent childhood obesity that aims to enhance participants’ agency. We argue that situating obesity within the individual’s multi-layered context not only provides a more robust understanding of the causes, but also generates sustainable options for promoting healthy lifestyles. Our findings emphasise the importance of a situated approach to learning that leverages social systems as a key resource for better navigating the environmental, material and ideational infrastructures that support healthy lifestyles.