This study aims to investigate the perception of happiness of children in the middle childhood stage and adolescents. In this context, it was sought to answer the questions of how children define happiness, how they make people around them happy, and what other people around them do to make them happy. Also, it was investigated whether there is a difference between children of middle childhood stage and adolescents regarding those questions. The research employed a qualitative phenomenological method, and the sample of the study was selected from a rural area of Agri province. The study group consisted of 95 participants 48 of whom are at middle chilhood and 47 pre -adolescents. Within the scope of the research, data were obtained through semi -structured interviews that were formed through expert opinions. Content and descriptive analyses were used in the analysis of the data. As a result of the research, it was found that there was a similarity between the methods of children's making and being happy; however, there were some differences in terms of development levels and gender. Besides that, considering the obtained results, there was a consistency with the existing litreature about the perceptions of happiness. The results were discussed in terms of the literature on happiness, and child development and education.