Guide to teaching history through literature, ancient, world, and US history approaches using 3000 living books and literature sources. Children find their own method of playing, and it's amazing what they pick up.
First book is free.
Very nice, I think I even printed up a chart of the different basic symbols, and we searched pictures in articles for things we could recognize. Encarta Learning Zone - this looks like it could be a really good service if it weren't trying so hard to sell Hooked on Phonics. It's a blend of MSN and Encarta, and everything I've looked at thus far is free. It also has a Schoolhouse section, and ones for parents and educators. It looks like a really nice link farm too.