The problems experienced by children with cancer are routine hospital care, the economic support of parents, and education that is often left behind because they are often given permission to take treatment. Lack of education creates self-confidence and a sense of inferiority so that social skills are low. The solution offered to improve children's social skills is superflex learning. Through superflex learning, children are taught to recognize the hero in themselves so that they can help themselves in making self-improvements so that social skills, especially self-confidence, will increase. This report is part of the service activities carried out by the author with the following steps: (1) conducting social observations (2) superflex learning assistance (3) Exploring children's weaknesses in socializing and (4) using superflex learning strategies. After three meetings, there was an increase in social skills, especially the self-confidence of children with cancer at "Rumah Pejuang Kanker Ambu (RPKA)".