My 3yo has made a close friend at nursery with another boy, the boy seems sweet but his older brother (5) has a very aggressive nature(towards children and adults) and always has. He doesn’t go to school as he finds it hard around other children but we see both of them at a local playgroup (I also know their mum as we live in a small village, and we occasionally hang out). My toddler has started mimicking some of these behaviours and at the playgroup they have formed a little gang (including one girl), and it’s got to the point where they often start picking on and ‘attacking’ one of the group (it changes who). It’s often led by the older brother and the younger get children copy. I’ve had to take my child home early a couple of times after he or another has got hurt.
My question is: what can I do? the younger child is sweet, they attend nursery together, they will go into the same school, and they have formed a close bond. However I don’t really want my child hanging out with his brother, especially as they get older. Thanks!!