content: My husband and I have been on the quest to find junior encyclopedias for our kids. We have K-4 in the house, and regular World Books are over their heads. We have tried several series so far, and this one is one of the better ones. I don't love it because I'm a conservative and I find too many pop icons and politically correct entries in there, but as an educator it's complete enough. Your kids can't look up just anything and find it, but the reading level is actually very good so it's possible for them to "read through" these encyclopedias (not that you'd force them to do that!).The picture quality is good, the length of entries are good for lower elementary. I just wish they covered all the basic artists, composers, explorers, historical figures, etc, a little better.