With a total plot area of 10,000 square meters, capable of accommodating 500 children in 25 classes, Hailiang International Kinder Garden is a large boarding school located in Hailiang Education District where the layout planning is in high density form. With the consideration of securing a safer environment for children, a relatively flat land was chosen to build the kinder garden, where it is surrounded with a middle school, a primary school, stadiums and a reception center. It has been a major challenge for us to create a psychological-secured and joyful facility based on children psychology in such a complex environment. In the spirit of active response to the needs to feel safe psychologically and the needs for an interesting and playful architectural space, together with an extra attention to the complexity of the local contexts, in addition, based on the children’s perspective and experience, the design aims to create a likable, joyful, safe and interesting space for the kids with simplified but not simple design strategies. In the study of children psychology, the needs to feel safe and playful are the two very crucial elements. The design was inspired by the traditional and local-style enclosed courtyard residence in Zhuji, in which the indoor and outdoor environments are hormonally formed, giving response to both human dimensions and urban scales: the outline of the building gave response to the large-scale urban environments while integrated into the public space; the inside of the architecture gave response to a small-scale activities of human behaviors while creating a wide range selections of places to stay. Through a transformed and oval architectural curve, the design of the kinder garden simultaneously gives response to both the outside and inside spaces. From the outside, it corresponds to the large-scale urban environment. While from the inside, it corresponds to different small-scale interesting spaces built on the needs for children mentality. Together, the design created a safe and joyful land that specially belongs to the kids. To the side towards the courtyard, the flexible and flowing design was also applied with extra extension to the width of the corridor, forming several spare platforms where children can still enjoy the wonderful nature even in a rainy season. With the use of a “U” shape glass, the design provides us a soft and flowing outline, just like the warm arm of a mother. In this enclosed space created by the “U” shape glass, natural day light was delivered in a soft and mild feel, the change of the light and space adds to the playfulness of the kinder garden and makes it feel like a fairy land. A mild and warm color of yellow was derived from the traditional residence and we believe this color meets the needs of children mentality properly. Thus, from the construction of the architectural space, to the materials, details, colors, all of the design elements are formed based on the need of children psychology. Hopefully, Hailiang International Kinder Garden will be the joyful paradise for our children.