Based on the questionnaire analysis of the author's former paper, the analysis was verified by practice in class. In this research, the following three points are regarded as important : 1) Quality of "Formative play", 2) "Formative play" in which the learner himself can be conscious of what he wants to do, and 3) "Formative play", which is aimed at learning skills. From the results of the questionnaire by the children after the classes and the valuation of the children's learning by the author, it can be said that a meaningful result had been obtained because the classes cooperated with the art museum, the "view of choosing material and method" established the description of element as the core of activities, and because of the preparation of tools suitable for the processing of natural materials, etc.