The Next Generation Studies are two closely-related studies with the children of the long-running Dunedin Multidisciplinary Health and Development Study participants: the Parenting Study investigates how parenting practices are passed from one generation to another. The Next Generation Study focuses on the well-being of the teenage children of the Dunedin Study participants. The aim is to understand how health, well-being, and lifestyle transfer between parents and children and what protects children from or increases their risk of developing problems. These studies have been running for several years, have been very successful in collecting data from the children and families involved. This application will extend the collection to include the children who have been too young to be assessed up until now and will enable further analyses of the data that we have collected.