This thesis project, City of Kids, examines the question that how can architectural elements optimize the traditional method of early childhood development. This thesis proposal primarily focuses on the impacts of spatial arrangement and program relationship of a designed kindergarten. The site for this project located at City of Hangzhou, Zhejiang Province, China. The theoretical premise/ unifying idea that directs the investigation is rational architectural space and meticulous programming promotes kids’ experience and early development in their childhood. The importance and practical implication of this project is to create a prototype of renovated kindergarten in China that brings more opportunities and possibilities to the education for kids.