"Who owns nature? What does responsibility mean? Do we need rules? What is renunciation? Can the future be planned? Can children answer such questions? You can certainly reflect on these topics, with surprisingly profound and refreshingly vibrant perspectives: children philosophize about sustainability and enjoy doing so! The project 'Young Thinkers' encourages children to think together about the future, humanity and nature, consumption, joy of life, cultures, and community. Through this project, the Academy for Children's Philosophy, in collaboration with the Eberhard von Kuenheim Foundation, has demonstrated that it is possible to philosophize with preschool and elementary school children about sustainability topics. How can you, as an educator or elementary school teacher, practically implement reflections on sustainability? This book provides you with useful suggestions for that.".