Hi I'm after some advice about a friend's ds1 who has recently turned 4 yrs old. He is persistently and severely hurting other children. It has been going on for a while and in my opinion he is getting worse. On Sunday we were at a playground and he stabbed my son (who has a language disorder) in the head with a stick, then bit some random kids on a bouncey castle and just kept going like this all afternoon pushing and thumping etc at whoever he could. What annoys me is his parents just laugh it off that he's a bit naughty when you approach the subject. Apparently at nursery he has his own naughty step and they are constantly getting pulled up about his behaviour. I thought perhaps he might have ADHD but from what I can gather he goes to bed at a reasonable time. Does anyone know what might be wrong. It's become quite awkward as I can't go on putting my kids through torture and part of me feels like telling her my concerns for her son, that he is beyond naughty but don't really feel it's my place. Any advice would be appreciated