I have five children. Three of them have a child/children. The other two never will. Three are comfortably off, one not so much, and one is fairly hard-up. We have helped them all out, in a limited way over the years. Apart from the value of the house I don’t have a great deal to leave.
When DH and I discussed making our wills we considered the different financial positions of our children, and whether to leave anything to the grandchildren. At the time only one daughter had a family. We decided that the only fair way was a straight split between the five ‘children’. They all know what was decided, and agree with the decision.
Having said that, various ones have helped out their siblings financially when the need arose, either as a loan or a gift. I know that they will still do the same in the future if one of them hits hard times, or the grandkids need help. That made our decision easier.
Different people have different situations, however. If in doubt, I would discuss it with the family, and hope that they all agree with what’s decided.