Musical education is a part of aesthetic education, the goal of which is to arouse and develop a child's feeling and sense of beauty in music, art in general, and beyond. Music should be performed for active listening, performance, and creation, as well as participation and appreciation of music, and the role of preschool institutions should be to prepare children for a life in which music is an integral part of everyday life. Musical activities are the best medium for a child's creative expression and development of creative potential in early and preschool age. On the other hand, mathematics is not only about numbers but about life because it describes the world we live in and bursts with creativity. Music and mathematics are inextricably linked, and this relationship was noticed by Pythagoras. Many associate mathematics with music because the two disciplines share much in common, including the use of abstract reasoning. In the introductory part of the study, it is described how music affects the child, the children's musical abilities and the role of educators in encouraging them. In the second part of the study, it is described how mathematics affects the child, the children's pre-mathematical abilities and the role of educators in encouraging them. In the last part of the paper, it is described how musical activities influence the development of children's mathematical abilities, and practical activities with preschool children are presented to show a concrete way of connecting music and mathematics through play.