This study was to investigate how experiencing activities developing responsibility effect young children s practice of making relationships with self and others. For the purpose, 27 five-year-old children participated 12 activities developing responsibility during 6 weeks, and each child experienced 12 activities. The difference of pre- and post-test performances of making relationship with self and others were compared. Results of this study were, first, young children’s self-esteem presented as performance of making relationship with self, there were significant differences of self perception on performance ability of cognitive ability and mother acceptance. Second, young children’s peer acceptance presented as performance of making relationship with others, there were significant differences on all sub-categories of social ability, social spontaneity, and leadership. These results show the possibility of implementation of activities developing responsibility and verify that activities developing responsibility can be the major experience to realize a desirable development through the change of the performance of making relationships with self and others.