Generally speaking, few children take the initiative to study. I think he was probably inspired by something, such as cartoons \ TV programs \ unintentional dialogue and guidance by adults, or he consciously wanted to attract the attention of his family. As for getting up in the middle of the night, it is not surprising for children. Their work and rest are different from those of adults. They are very energetic at night. But anyway, I think this is a good opportunity. Parents had better take this opportunity to teach him to read. Use some interesting books to guide him into the writing world and tell him that there is literature, especially his right and fun to read words at will. This is an important part of early education. The key is to find a suitable book for him, not too simple, not too many pictures, not all words, and not to choose for him according to the standards of adults. You can put some books in front of him and tell him what this book is about. Never say anything special. You should give him suspense, ask him knowledge, and let him choose for himself (in fact, he will ask for something else soon after reading a book). But don't mistakenly think that children don't know anything, they must start with the simplest. No, modern research shows that there is not much difference between the word "person" and the word "barnyard grass" in the eyes of children.