The wood harmonica is a tool to cultivate your baby's musical quality and musical perception, as well as to train your baby's lung function, breathing volume and rhythm skills. During the development of the infant's brain, listening to music will increase the communication channels of the central nervous system. In infancy, if parents ignore the role of music, then they will miss many opportunities to develop the potential of the infant's brain. The harmonica music is clear, full tone and loud. It can cultivate children's interest in music, develop their potential artistic cells, and increase their sense of music.