Because motivations for prosocial actions typically are unclear, sometimes even to actors but especially for observers, it is difficult to study prosocial motivation. This article reviews research that provides evidence regarding children's motives for prosocial behaviors. First, we present a heuristic model to classify motives on the dimension of reflecting altruistic (with the ultimate goal of benefiting another) to egoism (the ultimate goal of benefiting the self) goals; in addition, we briefly discuss classifying motives based on a continuum of morality. Next, we review findings indicating the existence of a number of different motives in our model and briefly discuss developmental issues, when possible. Future directions for the study of prosocial motivation are proposed.