The book uses this (oddly) to say that children must always obey and serve their parents. In fact, the Gospel text goes on to say that Jesus rebuked his parents, saying, Why were you looking for me? Didn’t you know I’d be in my father’s house?
The engraving shows Jesus sitting on a stool, with a book on a reading-desk, expounding forth to a group of older bearded sages. In fact, the Jews were far more likely to have used scrolls rather than books, although the Christians later did use the codex, or book.