Well, Anxiety got there before me. I, too, am thinking that you can leave a small monetary gift for each child--a bond seems like a great idea, but I hadn't thought that far in advance--but anyway, leave enough to establish that you are not actively punishing the kids. Every few years, you can always revisit these bequests and make them more or less generous.
But leave nothing for people who have actively disdained you. I don't think of it so much as revenge; I think of it as karma. Seriously, if people treat you like crap, can they reasonably expect you to treat them with generosity? If you leave them loads of money, you have justified their smug bigotry; if you leave them nothing, all you really do is confirm their existing feelings about you. If you leave them nothing while leaving something for the kids, I'm not sure what effect that will have! Bigots don't tend to be very reflective about their bigotry, but maybe you will give them food for thought. Or maybe not. But if you want, your will can make abundantly clear why the kids are getting something but your siblings aren't.
Perhaps the best of us would counsel you to "turn the other cheek," but I'm a fan of "what goes around comes around." I believe that rewarding bigotry is problematic.
Love the subject line, by the way.