The purpose of the study is to contribute to generating an evidence base around what constitutes effective early life kaupapa Māori programming for children and whānau that will lead to improved health and wellbeing outcomes in later life for tamariki and for whānau. The study will investigate whether exposure to the Kōpae Piripono (early life programme) whānau development model has resulted in positive outcomes for tamariki and whānau and what aspects of the model have most influenced whānau. The research will be located at the interface between mātauranga Māori and Western science. The research will contribute to the development and scaling up of early life interventions for tamariki and their whānau that lead to improved health outcomes in later life in areas of substantial ethnic disparity for Māori (e.g. non-communicable diseases). Importantly the study will build the host organisation's research capacity to engage in a planned longitudinal research programme.