The best gift you can give your kids in years to come is for you to be self-reliant and not needy of them. Allocate your resources to achieve that. If you can go through your life without having to be propped up by your children and if you can leave enough to take care of your funeral and burial, then you'll have left no one with anything to complain about. No one is owed an inheritance.

If there happens to be a few bucks left over when you are gone, the kids will probably just resent who got what, no matter how it's divided up.