Good ideas.I would suggest first looking at extended family.
Any cousins or neices or nephews?
Then I would look at friends who might have a bunch of kids and be in need....
If none of the above options impress you... then pick a charity.
My extended family is either all set, or not someone I'd leave anything to. Yup, got some rotten apples in the basket.
We've talked about a friend of ours who is young enough to be our daughter, and I'm thinking we'll leave her something. Our neighbors are fine people, and one of them has young kids, so we might do something there, too.
We've talked about leaving our land to some kind of conservancy program. We'll see what the next decades bring, as far as that goes.
Or we could end up needing it all in our later years. Who knows?