The project titled "Cultural Mosaic: Crossing Borders Through Playing" is an exchange involving young people from four partner organisations (in France (1), Serbia (1) and Belgium (2)). The project aims to create an intercultural framework to enable young people to experience immersion with peers from different nationalities. Beyond meeting others, the group of young people has set the objective of designing and creating a gaming tool to playfully approach cultural differences and the notion of european identity. Through this project, we aim to achieve the following main goals : O1: Raise awareness of one's own prejudices and stereotypes, their impact(s) and how to deconstruct them. O2: Support young people in a mobility project. O3: Foster a sense of European citizenship, its belonging, and diversity. O4: Design and build a tool, all created by and for young people, to promote intercultural encounters while overstepping language obstacles.