This project is based on some of the Sustainable Development Goals of the 2030 Agenda and aims to educate responsible students that act right locally, knowing that their acts have consequences that can affect the whole world. It joins schools from four different countries (Bulgaria, Italy, Greece and Spain) and very different contexts (from small rural schools to schools with hundreds of pupils), which permit us to show pupils the different life styles in Europe, emphasising that all of them can be sustainable. We pretend to widen their minds, help them to value their own natural and cultural heritage, value and know new places and cultures, and fight against discrimination and prejudices by knowing their condition as European citizens.