There are many varieties of children electronic music toys in the market, and the prices are expensive. At present, the more commonly used classification methods include classification by material, classification by age of users, classification by product technology and functional structure, and so on.Many children's electronic music toys have controls that allow children to adjust the tempo or volume of the music they are creating. This can help children learn to control the pace and loudness of their music, and can also be a fun way for them to experiment with different sounds.