Today, 'Public Involvement' in the development of large-scale public works such as offshore airports has become very important. In this study, a questionnaire survey was done on the school children living near the coasts in order to get present and future scope of both sandy beaches and tidal flats. The school children were asked to answer to ordinary questionnaire and also to draw the picture on the desirable use of coasts. As a result, it has been understood that the children think that 'playing' is important on sandy beaches and 'learning' is important on tidal flats. It has been concluded that getting scopes of children through picture drawing is quite effective.