Many observers of children's play have been interested in why children hide. This paper illustrated the process of the author's understanding of children's acts of hiding, and also suggested inter-subjective research hypotheses. Five- (n = 29) and six-year old (n = 19) children were studied through participant observation, during a total of 65 play episodes. The KJ method (Analysis 1) classified the 65 episodes into 13 primary categories. These 13 categories were then classified into 4 secondary categories, and finally "dramatic" and "interpersonal" acts were formed as 2 aggregate categories. Analysis 2 suggested the hypothesis that triadic relationships involved the creation of enclosing, covering, and separating, when children hid during play. Triads were characterized by a hiding "subject" (participants), a physical and psychological "place," and "others" (outsiders). Finally, Burke's (1952 / 1982) "dramatism" perspective was introduced to offer two possible motives for why children hide.