In this paper, we examined a situation on spontaneous sharing of space between two lower elementary school children, who did a drawing and painting activity using the same drawing paper, materials, and tools. Three researchers analyzed the relevance regarding the way of involvement with the partner and the expression contents by qualitative analyses through the use of triangulation. Results clearly showed that in a chain of actions between the pair, the way of handling the paper and tools, the way of drawing and painting, and their meanings influenced each other, so that the intention of that activity was coordinated, while sharing a space. In other words, the situation of sharing a place of use is statically regarded as the positional relationship of the iconography on the drawing paper when physically considered. However, it clearly reflects the dynamic transition in the relationship between the pair when considered from the situation, it turned out that the germination of cooperativity appeared there.