Oh my, yes i too was a the elder of two girls. My little sister being a couple of years younger. And I had a little bro 10 years younger, and like someone said, the rivalry was never an issue with the little one. But, I have to agree that it really is something you have to go through and learn to deal with as it teaches you a lot about real life in the long run, which isn't helpful when you are the parent having to deal with it, I know. I remember always feeling I was getting the blame. But my mum would say that I am the eldest and therefore should be more responsible. So I agree that perhaps a more grown-up one-on-one activity as a priviledge for behaving more responsibly would work a treat. And also if the younger is given a job suitable for their age, explain to the older that they have been given a job and that when they get older they will get more responsiblities too (so that they understand, if they question how fair it is). My mum was also very good at ignoring our squabbles and never getting involved, which meant that with no attention it usually died down when there wasn't an audience.