This study aims at considering the interaction between children s ways of becoming members of society and space through observation of their play settings. This study revealed the following results. Children acquire sociality by trying to understand the internal environment of a building as a whole. To clarify , understanding environment means to recognize the existence of their surroundings. The interaction between nearby playgroups occurs quite often and also is a valuable method of learning. This leads to the establishment of functions of play and activation of the children. For example, sometimes they call to one another from separate settings in order to construct relationships; furthermore, they create new functions within the exsiting environment to develop their play.