text: how to deal with my nephew? my nephew is 5 years old and has recently started school the past couple of months his behaver has been very up and down and we are always unsure from day to day how he is going to behave, there have been a couple of serious incidents that have occured  1 - biting a child in school for a football 2 - stabbing a child in the neck with a pencil because he wanted the colour the other child had 3 - in a play area he pulled another childs glasses of and broke them in half  all these behaviours and worrying myself and my sister and we are struggling to deal with them we have not let him out, took his toys and computer games etc we have talked and shouted but it just seems as though he has a wee switch in him that he goes from being so good to so bad. i am in the child care professional myself but am still struggling to deal with this behaviour.  can anyone help? what is life like at home for him? my nephew has a very similar problem... his parents have a rocky relationship, at best. when it seems things are okay, we never hear about incidents, but the moment sil calls to cry about her emotionally abusive husband, we also hear about my nephew having issues at school with biting and other physically aggressive, angry behavior. he's 4.