Through this project we aimed to support young people's mental wellbeing, social inclusion and active participation through international cooperation between Maardu Gümnaasium in Estonia and Collège Mathurin Régnier in France. The project gave students from both schools the opportunity to meet, learn together and discuss important topics related to wellbeing, stress, emotions, self-confidence and positive relationships. The main objective of the project was to raise young people's awareness of mental health and to help them develop practical skills for taking care of themselves and supporting others. We used: • non-formal learning activities, • creative tasks, • teamwork, • discussions and reflection, • we learned how to recognise stress, • we learned how to express emotions, • we learned how to communicate better and use healthy coping strategies in everyday life. We gave the young participants organisational tasks in order to teach them independence and independent thinking. For example, in Chartres, France, the students had to organise themselves and make sure that all project activities were carried out. Two teachers accompanied the group and made sure that the young people could manage everything and that everything was safe for them. The activities of the Estonian group were supervised by two young people from Maardu Gümnaasium and one of our young people assisted the French group. When the French students came to Estonia during the second mobility, the Estonian group was assisted by one of Maardu Gymnasium students (18 years old). We assessed that the two group leaders who accompanied the French students could manage on their own, as the French group was small, with 10 students. Another important objective was to promote inclusion and equal participation. The project involved young people with different backgrounds and experiences and gave them the opportunity to take part in an international learning experience. We wanted all participants to feel valued, heard and encouraged to take an active role in school and community life. The project also aimed to develop intercultural understanding and cooperation between Estonian and French young people. During the meetings held in both countries, students worked in international teams, shared their culture and practised communication, empathy and respect for diversity. Finally, we wanted the project to have a wider and lasting impact on the communities of both schools. The participants gained knowledge, confidence and practical ideas that they can share with their classmates and teachers. The cooperation between the two schools also created a stronger foundation for future Erasmus+ activities focusing on young people's wellbeing, inclusion and participation.