Young children who listen to music regularly demonstrate better development than those who do not. As children grow, their social, cognitive and physical skills can be enhanced by their relationship with music. The music of Mozart was introduced into the children's environment as a sensory background for the standard curriculum. The purpose of this experimental study was to investigate the effect of "The Mozart Effect: Music for Children" collection on the social, cognitive, and physical development of five and six-year-olds. Forty-two children participated. Twenty-one of them were in an experimental group exposed to music, composed by Mozart, accompanying their daily school programme for eight months. The control group, in the same kindergarten, following an identical curriculum, did not experience any accompanying music. To evaluate the children's development, a measurement called "The preschool and kindergarten children's performance scale", established and developed by Al-Batsh (2001) in Jordan, having the psychometric properties necessary for the study, was used. The results showed significant statistical differences in social, cognitive, and physical development favouring the children in the experimental group. Music can become an important part of any educational setting. It provides a positive atmosphere, which helps children to experience reduced stress and enhanced development.