The purpose of this study is to clarify environment composition and teachers' interaction encouraging children to move their bodies actively through their modification. The methods were as follows: 1. to observe children playing outside with a little movement, 2. to consider and to adopt environment composition which involves physical movement, 3. that teachers interact with children who play with a little movement so that they are willing to move more, 4. to record and to analyze episode of children when environment composition which encourages movement and of teachers' interaction were done, 5. to clarify environment composition and teachers' interaction leading to movement actively from the analysis. This research revealed these five points: 1. environment composition where children can consciously do physical activities, 2. existence of admirable persons in the same and different grades, 3. groups which raise their motivation to play, 4. teachers' interaction to develop children's mind of never giving up, 5. teachers' interaction to develop children’s confidence.