The author's first impression of the philosophy for children program in Hawai'i (p4c) was a strong, intuitive feeling that this approach to education can be a vehicle to change the world. This feeling has not faded at all in the course of her five-year commitment to p4c. Yet, as the author has exchanged her ideas about p4c with teachers and researchers, she has come to realize that these beliefs are not necessarily shared by others. Some of them have expressed a serious concern that p4c might result in value relativism. In this essay, the author will consider a role of philosophy for children in conducting moral education at public schools, particularly on the basis of her experiences with the p4c Hawai'i-Japan exchange program, in which she has explored the application of p4c to moral education.