This poster presentation explores how aesthetic learning processes and artistic expression can be used as powerful tools in education for sustainable development (ESD). Drawing on examples from both teacher education and primary school settings, we highlight collaborative art projects in which participants, both student teachers and school pupils, engaged with complex sustainability issues by creating large-scale collective paintings. These artworks served as both process and product: as a process, they offered participants a way to explore and deepen their understanding of sustainability; as a product, they visualized individual and shared knowledge, values, and future visions. The participants addressed themes such as climate change, biodiversity, and social justice through embodied, emotional, and creative experiences. The artistic process allowed them to express hope and concern, to make sense of difficult and sometimes distressing topics, and to build a sense of community and agency. The paintings functioned as dialogic spaces, making visible the diverse understandings and prior knowledge students brought with them, as well as the new insights they gained through participation. By integrating ESD with aesthetic learning processes, the projects enabled learners to connect cognitive, emotional, and social dimensions of learning. The poster emphasizes the importance of such interdisciplinary and experiential approaches, suggesting that when students imagine and co-create visions of a different future, they do more than learn about sustainability, they begin to practice it.