I have no kids, and based on my age, I don't necessarily believe I ever will. I'm certainly young enough to, but I don't know that it would fit with my particular life. I'm also not sure I want kids. But I do have a niece and nephew who if they show any interest, I may leave my guns to them. Their parents are super liberal though and scared of guns, so I have a bad feeling they will be the same. But as ColtPythonElite points out, they are just things, and if the kids would rather have the money, what do I care if I'm dead. They can sell them.
However, the ones I'm really attached to, I'd maybe want to help a young enthusiast out with by giving them a gun. I hope to encounter a young person I like enough to do that for.