Working outside can be harder than inside; one may be physically more active, regularly battling against the elements and often more alert – watchful for potential dangers. Overall education out of doors is physically and mentally taxing. We have to be convinced all the effort is for a good reason (Bilton, 2010, p. 12). The researchers applied the mixed method with covergent parallel design (Creswell, 2016). The results showed that 1) The initial description of prosocial behaviour of young children in Joy Kids Kindergarten, Mangasa Subdistrict, Tamalate Makassar District, showed that teachers paid attention to improve and look for activities in the form of play so that things that were worse towards prosocial behaviour of children could be avoided. 2) The traditional game-based outdoor learning module produced has been accepted from the results of an assessment of the utility, feasibility and accuracy, carried out by two experts in the field of education and an education practitioner. 3) The traditional game-based outdoor learning module that is produced affects the development of prosocial behaviour of young children. Based on the validator’s evaluation, it is declared valid to be used, its practical value is feasible to be used in the field without the need for revision, and all the devices previously presented can be declared valid for use.