This report addresses the growing concern of overweight and obesity among children and adolescents in Western Australia. It begins by assessing the needs, highlighting the prevalence of obesity and its associated health risks, and focusing on the target group of children under 5 and adolescents up to 16 years old. The report then sets a goal to create an environmental behavioral synergy to promote healthy weight. Objectives are set to change family eating habits, promote school activities, and advocate for parental involvement. Intervention strategies include identifying behavioral and environmental factors, promoting healthy eating and physical activity, and integrating legislative and policy approaches. The report proposes formative evaluation methods to assess the program's viability and impact. The report emphasizes the importance of addressing this issue to ensure the future health and well-being of the population.