My DS (3yr2mths) has just started nursery and today I was told that he literally jumped on four children and grabbed them around the neck. Sadly, we've been having this behaviour problem for about two years now. He is a gorgeous little boy, very affectionate and gentle but when frustrated?? bored?? overemotional?? he lashes out. I've done the usual - removed him from the situation, time out, talked to him about it and so on but nothing works. I am at my wits end. I don't know what else to do and am starting to panic. In addition to all of this the nursery teacher also asked me if I had noticed that he had understanding problems. I was shocked, as I think that he is a bright little boy and I hadn't noticed anything like that. I've arranged to speak to the Nursery teacher to speak to her properly but the earliest she can see me is next Tuesday. I am worried sick. What could be wrong with him? What am I doing wrong?