ds is 2 and a half, today after dd came home from school he has bit her - he had left a pretty nasty indent in her leg though didnt draw blood iyswim. I placed him on the thinking stair and told him he was naughty but he looked quite pleased with himself. he then went and said sorry and hugged his sister. We then all went upstairs and dd appeared with another bite - put him in his room and told him he was naughty but again he didnt seem to phased and said sorry afterwards. Any tips? He is a good boy in general but around dd hes a tike - his other favourite trick is climbing on to the dining room table as soon as i leave the room leaving them both alone. I remove him and put him on the stair and hes just not phased enough as he does it again .