The Longitudinal Study of Australian Children (LSAC) commenced in 2004. It collects a range of information about the physical health and social, cognitive and emotional development of Australian children from infancy and early childhood, following two cohorts of different age groups. The annual report for 2008/09 provides an overview of the Wave 3 data collection and premilinary findings, with the children now aged 4-5 years and 8-9 years. It includes feature articles on breastfeeding and infants' time use; how well Australian infants and children aged 4 to 5 years are doing; and stress and psychological distress in mothers of infants. It also lists key personnel, publications, and presentations.