Colt is in a stage where he says "what?" like 700x (and no, I'm not exaggerating). . . after I have repeated myself those 700x, I KNOW he MUST have heard me at least once. So, today I told him he COULD NOT say "what?" until he had stopped to think about what that person had said. If he still couldn't figure it out, then he could say, "Would you please repeat yourself?"
That seemed to go over well. Later, I said something to him. . . and he replied, "Please COMPLETE yourself!!"