This book deals with themes concerning religious education and the spirituality of children. Throughout the seventeen chapters, the book stimulates a scholarly discussion about children and theology. The book makes clear that classical Christian theology can benefit from taking seriously children's voices and reflections about children. The volume demonstrates how nuanced and interdisciplinary reflections can be relevant for Christian and social practices of adults with children and how these practices can influence theology. This volume asks the following questions: - Why is it important that we hear the 'voices of children' and what does this mean for how we treat children and relate to them? - What do the 'voices of children' express? How do children experience society and, in particular, religion, and what do they have to say about it? - What do the 'voices of children' mean for theology, ethics and religious education? In what way can our theology change when we see reality from the perspective of children?