OPAL -- Outdoor Play and Learning, in collaboration with Earth Day Canada, is a national program that encourages outdoor play in public schools across Canada. This paper focuses on the implementation of OPAL in an elementary school in Toronto. The initial implementation strategies of the program are discussed, which include efforts to create a play policy framework that centres childhood relations with the outdoors or 'environment'. Employing posthuman and/or more-than-human frameworks, I examine the potential of OPAL to become a practice of learning with environments as opposed to learning about the environment. This is a significant shift in childhood thought and practice that requires serious consideration and pedagogical attention to how environmental education can move toward transdisciplinary practices in more-than-human worlds.