The project entitled "Let's run for success" was the result of a grassroots initiative by groups of young people from Poland and Lithuania. We implemented this project in order to strengthen young people's motivation for an active and healthy lifestyle, as well as to help them incur social, linguistic and interpersonal competencies. The motive behind the mobility was to gain knowledge and skills in sports, healthy and ecological lifestyles. The specific goals we achieved in this regard were: - to increase motivation for sports and active leisure activities; - strengthening attitudes of openness, tolerance, respect and honesty towards others, both in sports and in life; - increased awareness of one's own body and one's abilities; - increase knowledge of healthy nutrition and ecological lifestyles; - development of social competence and the ability to work in an international team; - practical improvement of language and interpersonal skills; - strengthening self-confidence and ability to cope with stress; - Polish-Lithuanian integration, establishment of international acquaintanceships and friendships by project participants; - gaining new knowledge about European cultures, customs and lifestyles; - strengthening prospects for further development and self-education. Project participants gained international experience that will facilitate their further development in the school, university, professional, as well as personal spheres. In turn, the partner organizations gained further experience of working with young people, so they will be able to even better implement further mobility projects in the future.