I think I might be able to help you there. The book I've got is called "The American Heritage Picture History of The Civil War" by Bruce Catton. ISBN 0-517-385562
It's got wonderful illustrations and pictures. It covers the war a little lightly, but whenever I hear a battlefield name mentioned now, I have a picture in my mind of the terrain illustrated in this book. I highly recommend it, especially for kids (even fifty year old kids like myself).
Another Civil War book I have that I can't recommend as highly, unless you're the scholarly type, is "The Blue and The Gray" by Henry Steele Commager. A lot of good information there, but it gets pretty dense at times. Still, there are a few memorable moments here and there.