The goal of the Prime Family Lab is to understand and support social-emotional and cognitive development in children and youth using a family framework. We examine how children's environments work together to influence their language, cognition, self regulation, behaviour, and mental health. Throughout projects, we emphasize the family context: what are the patterns of interaction between parents and children, siblings, and whole families that help or hinder children's adjustment? What are the contextual factors that influence how family members interact with one another? Most importantly, how can we support families to build strong relationships and engage with one another in a way that promotes the well-being of children and their families?