Abstract
This study uses the naturalistic observation method to investigate the building block play of a child (Child A) from the age of 1 year six months to two years old. The child's play was analyzed and the developmental characteristics leading to three-dimensional molding were investigated. The child was observed to experience the basic actions of building block play, that is, "building," "breaking down," "hitting and making sound," and "lining up." After acquiring the "building" action, the child repeated "challenging" play and "confirming" play, and was observed to experience concepts like "interval," "width, depth, and height," "center of gravity," and "balance." We can point out that the child was acquiring the concepts of "plane," and "dimension" through building block play.
