It is considered that music which is based on creativity and is an art of sound can be used in various ways as a teaching method in preschool. However, it is observed that efficient use is not made of teaching methods including mainly voice training and instrument training, and that an appropriate repertoire is not formed. Therefore, forming a nursery rhymes repertoire for preschool children, which is appropriate for the necessities of the Early Childhood Education Program. Also, the aim of this research is to help music teachers at pre-school level carry out more efficient and productive work. Towards this aim, a song repertoire has been formed by the researcher, experimental and control groups have been specified and work has been done with the experimental group for 12 weeks. A pre test and a final test has been applied to the experimental and control groups before and after practice with the use of a "musical skills measuring device" prepared by the researcher. It has been benefited from the SPSS 13.0 packet program for the statistical solutions of the data gathered as part of the main aim of the research and main problem. According to the data gained from the research results, it has been observed that the activities performed in music education with the song repertoire prepared and applied by the researcher have created a positive effect on the musical development of 6 year old children. (C) 2015 The Authors. Published by Elsevier Ltd.