Nowadays, most children attend supplementary classes. This research attempts to review and summarize the results of 14 international studies on the influence of music lessons on children aged 5-12. The paper considers the influence of music lessons on the development of regulatory functions and language abilities. The authors conclude that music lessons have a significant influence on the regulatory functions of children, especially on inhibition and working memory. The relationship between language and music classes highlighted in numerous studies are discussed. With prolonged daily music lessons, children can develop vocabulary and phonological awareness.