I feel exhausted just reading your posts about your 3 year old! Things I picked up on are the changes you've had, daughter changing nursery, moving house, new baby coming along. It's also a good idea to get your daughter to help out with anything connected to baby e.g. nappy changing, pushing him on the swing, etc. Then there are the times when she is "whacking her brother over the head with her teddy" and what do you do? Don't worry about upsetting her. You can explain to a 3 year old that this is wrong behaviour and at least remove the teddy! Also try not to give your daughter too many choices as it confuses them.