When my 3-year-old son is cooperative, obedient, and compliant, I know something is very wrong. Sure enough, he had a stomach bug. He's better now. I know because he is taking things apart that I was heretofore unaware could be taken apart, trying to explore places he has not ventured to before, seeing if he can play his toy piano with toy trucks, second-guessing everything I say, that kind of thing. For me, that means, everything is good with him again.