My friend's son has started hitting/pushing/scratching other children and it is getting her down. I never had any trouble like this with my own so I don't know what to suggest. He doesn't understand that what he's doing is wrong and will say sorry but doesn't know why he's saying sorry. Its usually with children the same height as him and sometimes will be because they're in his way, have a toy he wants or are just 'there'.
Please help!