I have a concern about aggressive behavior in a nearly 3 year old child. I trade babysitting with my neighbor and her little boy. My son has never been hurt while she is babysitting, but her child is aggressive to my child everytime I am present. My little guy (3yr 2mo) is not typically aggressive, but has had his moments of glory in the aggression ring. His little friend that comes over to play and to be babysat is what I feel, very aggressive. I understand that aggressive behavior in toddlers is typical due to communication issues, independance struggles, situational (tired, hungry, sick) and so on. My son has come away from some of his playdates bruised and or bloody. The last playdate my son was punched in the face, thrown to the concrete, pinned and held to the floor (while screaming bloody murder), and jerked back by his shirt at the neck, while he was walking forward. That action took him to the floor on his rearend in a backwards motion strong enough to pull off his shoes. The peroid of play time was less than an hour, with the childs mother present. A few playdates ago her son bit my son's nose, severly bruising his nose and upper lip and broke the skin at the side of his nose. She was not present for that one. The issues are usually about a toy, rather the fact my guy has a toy the other child has to have and my guy gets hurt in the transfer of said toy. The Mother of the offending child sternly tells the child - No No that is not nice. That is not how we treat our friends. You need to appologize. The child screams through the entire ordeal, never appologizes and begins the next attack. Sounds brutal, but trust me it is more brutal to watch it happen. My son is typically a peaceful not whiny kind of kid. His only biting was way back when he was nursing. But now that has changed. Since being bit by the neighbor's child, he bit me this last weekend, just kind of randomly and not in a raised emotional state. He has also picked up the crying/whining at EVERYTHING if he doesn't get his way, thing his little friend does whenever they are together. One other observation I have made with this little boy is that he is very aggressive and hurtful to his cat and my dog, when he is in a playful state. Seriously, I know I can just end the playdates and babysitting, but I actually care for and like my neighbor and I like my son to be socialized with different children as he is a stay at home kid. I don't think the Mom is dealing with the situation very well, and I don't know what to do with it either. HELP PLEASE