Our Choice is a partnership between a university-affiliated research institute, a federally qualified health center, and a county public health department. We used formative research, advisory committee members' recommendations, and previous research to inform the development of the Our Choice project. Our theory-informed multi-sector, multi-level intervention targets improvements in four health behaviors: fruit, vegetable, and water consumption, physical activity, and sleep. Intervention partners include 1200 families, a federally qualified health center (including three clinics), 26 early care and education centers, two elementary school districts (and 20 elementary schools), three community recreation centers, and three restaurants. Intervention components in all sectors target changes in behaviors, policies, systems, and the social and physical environment. Evaluation activities include assessment of the primary outcome, BMI z-score, at baseline, 12- and 18-months post-baseline, and sector evaluations at baseline, 12, and 24-months.