Considering the increase of the social, economic and cultural divisions in many countries creating situations of failure, marginalization and risk among the youth, the partners of the project "Musical post cards" wish to act and help teenager audience who face difficulties on the personal level or with their environment (handicap, social difficulties, intercultural conflicts). It's not just a vulnerable audience in the phase of self-construction, but also a rich resource related to the desire of independence. We wish to develop a youth exchange in order to promote better understanding and appropriation of their surrounding of reciprocal life in their constraints and difficulties as well as in their potentials too. Collective music and dance practice will contribute in this exploration developing transposable skills and acquisitions facilitating their learning and peaceful interaction within social and cultural distant groups. The project will take place in France, January 2017, with 50 young people between 13 and 18 years old, living in France (15 teenager from Niort/ 5 teenagers Syrian refugees living in Lyon), in Bosnia (15 teenager without parents care from Sarajevo), in Turkey (15 Turkish teenager with a diverse cultural minorities : Gypsy, Kurdish, living in a popular neighborhood within a strong social mix undergoing a fast gentrification).These young people are concerned with different types of social and cultural marginalization, basic educative and linguistic difficulties, behaviour problems, psychological and physical suffering and distress related with life accidents and various traumas or situations of insecurity. Each partner organiztaion has been very active with diverse projects dealing with cultural and youth issue with these audiences with difficulties, aiming to promote the interaction among young people and their neighborhood, their family, and contributing to a better socialization, a better engagement in the different processes of learning or developing critical sense.This project will be about deepening the participants thinking and analysing skills and art practices by developing a common project about common topics (real life environment and dream environment / Work and money / forced displacement and sedentary life). The exchange will be equally an opportunity to initiate new learning process for young people and to value the importance of artistic and cultural practices in term of intercultural experience. The meeting will combine a music and sound collecting process, the sending exchange of the « Musical post cards » designed by the young participants in each country, and several steps of music composition or sound designing, leaded by professional multi-skills musicians, using as well traditional acoustic music material and more modern approach (electronic and other technologies). Musical materials as well as the life environment of the children will be valued as a constituent element inherent of their individual and collective identity, but also as a medium to facilitate dialogue with closed environment (family, friends, neighbours of different ages and from different social and cultural groups), and more distant environment. The designing of a common language through collected and new produced sources from each country will allow the “harmony” emerge, in a space where I was not expected previously. It will be a vector of experimentation concerning collective working methods aiming two directions: new learning process, collective artist designing, collective performance for a large audience.Through this conception, the young participants will get more awareness of the importance of crossing divers dimensions in expressing their thoughts and know-how, by exploring the balance between: rational approaches and more sensitive, spontaneous or emotional approaches.