The best material for children's English enlightenment is nursery rhymes video.
Communicate in English more often.
Communicate more in English at home! Even if parents' English pronunciation is not very good, as long as they insist on speaking English with their children, it will be enough to form the enlightenment effect at the mother tongue level.
Read the story aloud.
Reading English stories every day can stimulate children's curiosity and cultivate their interest in reading.