I have two children.
DD(3) and DD9mo. We were discussing tonight what to do for DD2's birthday - decided that we would just be having close family and friends over for afternoon tea cakes.
DH said we should have a present for DD1 as he think she might feel left out with DD2 getting presents and attention.
I think this is ridiculous personally and that it's perhaps sending the wrong message.
I never got presents on my older sisters birthday, DH would get presents on his siblings birthday though.