Chamber music plays a unifying and inspiring role in instrumental learning. It allows each student to adjust their own game (rhythm, accuracy, expression) to that of their partners. Playing with others for a satisfying common result is a source of gratifying pleasure. In Cross Games each voice is important - the difficulty is progressive, divided according to the instruments. The melody goes from one to the other so that everyone can play both the main role and that of accompanist. Crossed games, they are seven pieces with various styles, with simple melodies, easily memorized.