This qualitative research study examines moral responsiveness and thinking in a mixed gender class of primary school children over a period o f four and a half years. It sets out to track development in children’s moral awareness, looking at gains and losses from middle to late childhood, and focusing on cognitive skills, notions of moral rectitude, and interpersonal relationships and friendship. The first part of the study is designed to offer a theoretical background to inform interpretation of the data in the second part. It examines major issues in morality and moral education in the context of significant recent debates across several disciplines, including developmental psychology, philosophy, sociology and education; it also offers a theoretical perspective on children’s ability to think together about morality in a community of enquiry and on related issues of pedagogy. Through interpretation of transcripts, the second part o f the study analyses the children’s thinking, in response to a wide range of content, on issues of justice, freedom and responsibility, rights and duties, inclusiveness, and friendship. Gender differences, most notably the reticence of girls to express themselves in a mixed gender group after about age ten, are also examined. The study demonstrates how, through participation in a community of ethical enquiry such as Thinking Time - Philosophy with Children, children become more thoughtful and develop respect and responsiveness to others as well as other traits of character that are central to democratic citizenship.