Let children read more cartoon English books, and it is best to put some wallpaper on the wall, such as what month, what season, what relatives and what numbers. Ask him often.
Listen to English children's songs
In listening, it goes without saying that English nursery rhymes make him whine. Adults can accompany him, so that children will be more motivated.
Practice English calligraphy
If possible, teach him to practice English calligraphy. Beautiful English fonts are pleasant.