Funny phrase

So we got Bp the Towmater movie and he loves it. He also has the book and he loves that, too. He likes for us to read the book and then he rehearses some of the scenes with us. He likes for Warren to be the hospital and I get to make the ambulance noises. Funny that Warren represents a building instead of one of the characters. I'm not sure what that means exactly. :) So the movie has several additional scenes that the book leaves out, and one of the scenes Mater says, "you've got to be kidding me." So Benjamin has been saying that now and it's just hilarious. Hopefully, one day he will use it correctly. :)