This is the Phase Two report of the Australian Child Wellbeing Project (ACWP) which is a child-centred study that started with young peopleβs perspectives to design a major nationally representative survey of wellbeing among 8 - 14 year olds. The survey will benchmark child wellbeing in Australia and provide information that contributes to the development of effective services for young peopleβs healthy development. This document reports on Phase Two of the project: development of the wellbeing indicators. The development of indicators was informed by the findings of the first qualitative phase of the project, a review of literature and existing wellbeing measures, considerations related to online implementation, two stages of feedback from the Project Steering Group as well as cognitive interviews with children in the target population (i.e. Years 4, 6, and 8) who responded to various versions of the field trial questionnaire