Loose parts is often an ambiguous term with different interpretations depending on the context. Using the search parameters, a scoping review was implemented to narrow down over 2,400 articles related to "loose parts," "early childhood," and "outdoor classrooms" to 15 articles for in-depth review. From the selected research, a definition of loose parts in this context was formulated, a list of loose parts was extrapolated and analyzed, and descriptor words of the theory were discussed. A more uniform definition of loose parts potentially allows for more diverse application and use of this theory.