The author looks at play-based learning as a concept that supports the holistic development of children, defining such learning as a continuum of a child-directed, collaborative, and adult-directed play and discussing the role of adults on this continuum. King introduces into the discussion the theory of the play cycle and reviews tensions in play-based learning between policy, practice, and the interpretation of play, using the play cycle and adult roles in it to focus on the process of play rather than on its outcomes, which also contributes to a developing understanding of play-based learning itself.