How about enrolling children in English classes? What about something suitable for children?
Yes, you can try it first. If the child doesn't like it, don't force it. If children like it, they can enhance their interest in learning English. After all, it is quite difficult for them to learn English when they grow up, and many junior and senior high school students have a headache. There are also English classes, teaching English songs, giving speeches in English and performing sitcoms, which can enhance children's expressive power.