I totally agree! :-( My son is 2 & 4 mths, one month before, he was a very nice child, he liked sharing and playing with other children. I was proud of his behaviour. Suddenly, he changed (so fast). He, now, likes to hit other children and snatching others toys! No sharing at all! He almost hit all the children in his playgroup! Unfortuneately, most kids in his group are quiet kids,not as active as he. Children are sarced of him, i feel really really sad! How comes a lovely kid become a devil kid?! Hope it will change after he's 2 1/2 yrs. Any same experience? share pls! :-( :-( :-(