Incheon Children’s Science Museum is located at the entrance of KyeYang Mountain in Bang Chug-Dong, KyeYand-Gu, Incheon, where the nature and city are continuous. The Incheon City claims this project to be the first children’s specialized science museum ever built in Korea after 10 years of their long-cherished ambitions to promote the project. Therefore, the concept called ‘Sponge that embraces children’s dreams’ was set up based on the geographical context located at a place connecting the city with nature, main users of children and science exhibition, and program context. The concept of ‘Sponge’ was applied in all the design fields from start to finish as a keyword which created an integrated environment of architecture, exhibition, landscaping, and interior design. The conceptual development was conducted in the direction to realize four icons such as Dream Icon, Eco Icon, Community Icon and Funny Icon. In order to realize the concept, the building shape of tender that is familiar to children, design of irregularity and distinctive perforated elevation (Dream Icon), and diverse outdoor spaces (Eco Icon) where three-dimensional experience is possible for communicating with a city and harmonizing with the building had to be considered. Also the space (Funny Icon) where various sculptures, events and attractions were provided at the central hall connecting all exhibition halls so that many children can experience fun in science, while the flow of site was designed to cross inside and outside of the building naturally (Community Icon). It was intended to become one of landmarks symbolizing Incheon as an exhibition- science museum where children have fun and experience.