The purpose of this study was to examine young children’s perception of happiness. The participants were fifty seven 5-year-old children attending four public kindergartens in Jeollanam-do and Gyeonggi-do areas. They were interviewed about happiness using semi-structured questionnaire types of divergent questions. And they were asked to draw the picture on happiness and describe it in detail. Their responses were gathered and analyzed in terms of experiences of the happy moments and thoughts in their lives. The results of this study were as follows: the meaning of being happy was sorted into four different categories such as the happiness of individuals from inside, happiness of individuals from outside, happiness from social relationships, and happiness from social environment. First of all, happiness of individuals from inside was sorted by thoughts and feelings, flow and achievement. Second, happiness of individuals outside was sorted by activities, experience and exploration. Third, happiness from social relationships was sorted by family and friends, the ability to care and share, cooperation and collaboration. Finally, happiness from social environment on happiness was sorted by situations and objects, seasonal characteristic. These results can be the basis for the direction of happy curriculum for young children.