Ok I realize that most toddlers dont want to accept no as an answer & he is toddler-like in his reasoning ability so I guess this is actually fairly normal BUT he must learn to accept that no means no without getting mad & trying to hit people. He is a very strong 6yo. I cannot have him hitting at me or a sibling if he dosnt like the answer. I guess it is just a matter of being VERY, VERY, VERY consistant with him. Boy that is hard though, especially since he can hold out for a LOOOOOOOONG time if he really wants something.