Self-determination is a dispositional characteristic, expressed when people act as causal agents in their lives. It develops throughout the life course, starting in early childhood. Causal Agency Theory defines three self-determined actions that lead to self-determination, which are (1) volitional action: including making conscious choices based on one's own preferences, (2) agentic action: identifying actions that lead to a specific goal, and (3) action-control beliefs: believing in one's ability to carry out these chosen actions and feel supported in a pursuit of the goal. The purpose of this article is to provide practitioners with tools to support young children in the classroom and in partnership with families to develop and strengthen the foundations of self-determination skills and abilities.