Children have green cards. Can parents apply for a green card?

Honey, children have green cards, and parents can apply for them. Children have green cards, and parents can apply for green cards. If they don't have a green card, they can stay in the United States for half a year at most, and then they must come back after half a year, and then they can get a visa, so they can live in the United States for a long time. If the average child has a regular job in the United States, his income is still good. Their parents can apply for permanent residence in the United States, that is, to apply for a green card.