This book includes the content of all four I Didn't Know That books PLUS one BONUS BOOK, I Didn't Know That Some Trains Run On Water, in ONE REALLY BIG BOOK!Features: $7.99 Sturdy case hardcover binding Cover treated with eye-catching foil, embossed, and high-gloss enhancements Question-answering segments, colorful illustrations, fun facts, and exciting projects! Content so engaging kids won't even know they are learning!
