ds2 (12) and DD1 (nearly 11) bicker ALL the time when in each others company, and it is beginning to set the whole house by the ears! He is completely intolerant of her, and she is very self centered when around him They are very close in age and hormones are also beginning to feature. So many doors were shut tonight, TV remotes chucked and tears shed that dh blew up and we have all gone to bed! Does anyone have experience of this age or strategies they'd like to share? I have tried a variety of ideas from reasoning to time out and straight punishment of both but nothing is working ATM. Help!