Abstract
This study focuses on the generation and the sharing process of musical expression in play by children. Based on observation in a 4-year-old public kindergarten class, the interaction of inner, outer and expressive worlds of children is studied, and three stages are derived. 1. In the relationship with friends, children tend to convey their feelings and images to others and produce new expressions. 2. Musical expression generated in play is copied by friends, then image and feelings are shared. 3. As musical expression synchronized by physical motion is repeated several times, it becomes rhythmic and melodic, and generates a new play with musical communication. The important factor in the three stages is the relationship with friends. It is essential for musical expression to be generated and developed when children are playing.
