At the conference of general high school principals, which took place on the 17th and 18th of October in Olimje, we, as partners, presented our School21 project. We showed the principals the process of building an outdoor classroom and discussed the challenges and obstacles we encounter along the way. We shared our experiences gained during the project of outdoor teaching and happily answered various questions. In addition, we surprised the conference participants with promotional materials that they can use in nature and remember the pleasant meeting at Terme Olimje. We introduced our School21 project to the principals and inspired them to consider incorporating outdoor classrooms in the future. After all, you remember: learning can also be fun.