Where should I go to do this (details inside)?

OK so. The Fluther regulars probably know that I like kids and kids are a huge part of my life. (If you haven’t been around at the right times and want to know what I’m talking about, go here and read my first answer in the thread)
I was just reading Little Men, and I felt like now I know what I really want to do with my life and I feel that much closer to knowing what kind of children’s thing I want to do. I would like to, Lord willing, have some kind of a school or a home for kids that need it. But one problem: Where? Where in the country (or, maybe even in the world?) would be the best place? I guess it would be based on where is the neediest part of the world, but I really feel like that would go straight to some third-world country in Africa. Don’t get me wrong, I think it’s very important to help in third-world countries in Africa. But I feel like I would be more of a “ministry” (I couldn’t think of anything else to call it) here in the US with the kids that kind of get overlooked when people want to help kids. I hope that makes sense.