Forgot to mention this in my previous post. Before going to their blogs, all the kids signed a "Blogger's Contract", which I adapted from David Warlick's on Blogmeister. We had a good discussion about all the points, I think. The kids only asked a few questions, but they were good ones. A link to my version is here, for a while. I'm happy to have this as a guide. We'll refer to it a lot.