Three studies of children's sharing behavior were designed to discover the effects of success or failure on children's willingness to share material rewards with others. In two studies, age differences in willingness to share were noted. Extensive discussion of the results indicates how a child's self concept might influence a child's sharing. The third study explored the influence of variation in deserving on sharing behavior. Children who thought they deserved the reward shared less than children who thought they had not earned the reward. (DP)