“…Without appropriate, and accessible, outdoor space equipped to ensure the children's safety, whilst affording the opportunity to engage in risky play, it is difficult to promote nature-based play any further (Ernst, 2014). Over the last 10-15 years there has been an increased academic focus on the practical optimisation of outdoor play spaces and their affordances in the early years (Loebach et al, 2020;Maynard and Waters, 2014;Waters, 2017;White, 2019), where children are afforded challenge and risk within a framework of security and safety (White, 2019). Although multiple resources exist to support nature-based ELC, there remains a necessity to build and strengthen a robust evidence base around the effectiveness of outdoor nature-based ELC, specifically the environmental conditions and affordancesthe active ingredients -that support developmental outcomes of young children (Johnstone et al, 2022;Johnstone et al, 2022).…”