BACKGROUND: As a key factor for the prevention of childhood obesity, WHO recommends a specific balance of movement behaviours (ie, physical activity, sedentary behaviour, and sleep) across the 24-h day for children younger than 5 years. Substantial evidence underpins our understanding of the benefits for healthy growth and development; however, little is known about young children's experiences and perceptions, and whether context-specific factors that might influence movement behaviours differ across the globe. METHODS: Acknowledging children's agency as knowledgeable informants on matters affecting their lives, children aged 3-5 years from communities and preschools in urban and rural Australia, Chile, China, India, Morocco, and South Africa, were interviewed. Discussions were based on a socioecological framework of the multifactorial, complex influences on young children's movement behaviours. Prompts were adapted to ensure relevance across diverse study sites. Ethics