There are two kinds of children's coin-operated rocking songs. One is popular children's songs, such as Kojiro, who sells glutinous rice balls. I am a sheep, a cucumber baby and astro boy. The other kind is early education enlightenment songs, such as songs telling children to learn English words, as well as some familiar simple ancient poems, Saint Amethyst and so on. In short, these songs have the function of early education and intelligence for children, so that children can learn knowledge in happiness, which is also the reason why children like rocking cars and adults are willing to let them play.