Lay summary
Improving sleep in infants has been shown to substantially reduce the risk of child obesity, but in predominantly European populations. Maori and Pasifika expertise on sleep and wellbeing will be woven with scientific knowledge and a novel research technique (Multiphase Optimization StraTegy) to develop a sleep toolkit that Well Child providers and other health professionals (including dietitians) can use to improve sleep, reduce excessive weight gain, support communication and connectedness, and improve the wellbeing of tamariki and whanau.