Scientists now understand that nutrition in childhood and at each life stage thereafter affects health in adulthood. From adolescence, changing our diet and habits in response to changes in our own awareness can lead to improved nutritional status. However, to improve children’s nutritional status, especially in early childhood, both the child’s relationships with their caregivers and the provision of a suitable environment around them are important. The knowledge required to systematically consider children’s nutrition is steadily being assembled, including such extremely contemporary issues as children’s screen time and the new perspective of dietary diversity.