@Midwest67 , I’m one of the older bunch, and there is a much younger sibling, who got all kinds of stuff we never got. Because my parents were older, richer, and tired of sweating the small stuff by then. We joke about it, but really no one cares. The youngest did not get the benefit of growing up as part of the “pack”, so there were pluses and minuses. We all coordinate closely to care for our Mom, who cared for us all.
Our parents did work hard to make things fair, and told us that was their intention and why they did certain things. Both had had some favoritism in their own families.
We try to keep things fair, and I’m pretty open about that with the kids. We try to visit each about as often as the other, make gifts even, etc. One thought maybe the other had been short-changed at Christmas, until he looked up the price of the big item the other got.
Lots of talk here about helping with houses. Until my generation, no one ever had any money to do any such thing, and I’m not sure how we will approach it. Probably watch where the kids go and listen to what they want and figure something out on the fly that can be done “fairly.”