Picture the scene, you are coaching a group of keen 9-11 year old players.
You tell a 10 year old to drive, and you ask him to demonstrate the shot. He shadows it perfectly. Excellent.
You do some drills with a tennis ball and, with a little effort, he hits it back straight. Now we are talking!
You finish the session with a soft ball game: He swipes at the first half volley and tries to put it over square leg.