Re: Will they grow out of it?
Oh boy, my brothers and I are adults ( well, according to our age we should be anyway, wether or not our minds really have become adult is a different question, heehee ). We still regularly argue. As children we were worse, especially my older brother!
Usually children grow out of it. I guess it's the siblings thing, if there are siblings who never argue, then there is something wrong with them!
My children are younger then yours, they have two years between them and they argue a lot too. But when they are apart, they miss each other so much. It's unbelievable.