In the process when an infant grows up, the self-thing expressing is very important. The human being has an expression method to cry since I was born and mind and body grow up and understand things for eyes and an ear and a heart and learn a way of the expression such as giving off words. It is essential to express what I felt by oneself in that and that I thought for oneself in social, living. Therefore it is thought that I can bring up richer sensitivity and power to express by the music that is very close in expressing it deeply increasing. In this article, I investigate the meaning of an infant expressing it through music and, in the song and the music expression of the infant by the eurhythmics, consider how I should instruct it as a childminder.