There’s a saying that “Language is caught, not taught.” It would be impossible (and boring for both the adult and child!) to sit down and directly teach a child every word, phrase, or sentence structure he needs to know. It also wouldn’t lead to very natural results. Instead, the best language that children learn is picked up incidentally (indirectly, informally, in the course of daily life). So, how do we make our language more “catchable”?