There are ways to get creative with the will. One family I know had at least 3 kids, one of which wasn't stable. The estate was going to be quite small, the "stable" kids didn't really need the money, and the one who wasn't stable wouldn't be able to handle even that small amount. So... they asked the kids to each name a favorite charity, and the will is set to split that many ways, with the donations going in each child's name.
