Try amazon.com. I found
this book and
this book easily after a single search for "child labor."
I like to let her feed her interests, but I'm pretty uncomfortable with her going this direction. Sweatshops are cruel. And she's pretty sweet and innocent. When I tried to dissuade her she told me that this would help her be a better person and lean to do the right things, but in terms of material, this is definitely as dark as she's gone, which concerns me too. Thoughts about that?
I think that if she wants to know about the subject, you're in the best position to help her understand it in an age-appropriate and factual way. You can also answer her questions and help her understand the world. If you don't help her, who will? And if you don't want to talk about this problem because it makes you uneasy, will you teach her not to come to you with hard questions?
I've always been confused about the philosophy of hiding the realities of the world from kids. I know that it comes from an instinct to protect them, but I'm not sure how ignorance protects people (it usually seems to do the opposite). IMO, kids who live in good circumstances need to know that other kids don't live as well as they do. Right now, millions of children are suffering in wars, in famines, and umpteen other very serious problems. When these facts are hidden from children, they can be set up for some very hard landings later (in many ways). They can also seem clueless about the pain of others (because, well,
they are, which can be read as insensitivity). Sorry if I'm sounding harsh; you're obviously trying to help your daughter understand this problem. I'm also not advocating that kids be hammered with stories about INJUSTICE IS EVERYWHERE!! I'm only trying to show that there's another side to the idea of being too protective.