Abstract
In this article, I considered the collaborative organization of activity in the process of making a video letter with participant perspectives. In this case, three children constructed the activity through making a video letter. Their communications increase in density gradually while making the video letter, and they shift to reflective communication. Their individual action shifts to evolving a division of labor that consists of announcer, cameraman, and director. Their activity was organized for what is not yet there. They made a collective activity system by collaboration for their object. In short, the activity they organized is a collective instrument to create an object. Their learning occurs as distributed cognition.
