Another wonderful Chuck Jones and Norman Juster collaboration was The Phantom Tollbooth. It makes the same point but with grammar. I saw the movie a few years ago with my kids. I rented it on a lark and only because there was nothing else available in the store that was both appropriate or new to us. I was completely blown away by how good it was and we recently found the book and purchased it in a local store. After we finish the book we're reading together now, my daughter and I plan to take up this one. We'll see if the boy will show any interest in this one. Kate needs to give me advice on getting active sons to listen as one reads aloud!