Children's "strength for living" tends to be diminished in a life-style that is increasingly convenient and urbanized. For them, it is necessary not only to enhance their physical strength, but also to acquire the ability to think and to make their own judgments and decisions. For the children between three and six years of age, those abilities can be developed through creative play with their friends. In the kindergarten playground with grass and flowers, trees and birds, they will learn the joy of playing freely with others, and they will start having conversation with their friends. The development of the children, who all have different personalities, will be watched over by the teachers with great care.