Choose books with plenty of things to look at while you learn to read upside-down. Let them sit beside you if this is difficult. They will make the connection between the words and the story as you read and re-read their favorites. Give books as gifts. Join your children at the local library and take part in the activities there.
Story time is popular with toddlers.
Let them borrow as many books as they want, after all, their teeth cannot possibly rot from Fiction. They can play there as long as they like. None of them will manage to get into trouble there. Have piles of books in places where they can reach them. Be a book friendly house.