Just like dinosaurs themselves, this book is BIG -- big type, big format, big pictures. The kids will love it. What preschooler doesn't love dinosaurs? One trip to the American Museum of Natural History in New York City had my son, at age three and a half, talking a blue streak about stegosauruses, elasmosauruses, tyrannosauruses, and Heaven knows what else. "The Big Book of Dinosaurs" is organized into categories such as meat-eaters, boneheads (pachycephalosaurus and his ilk) and gargantuans such as brontosaurus. The double-page spreads with gorgeously illustrated dinosaurs are sure to hold a child's attention, and the text is succint and easy for them to understand. It's a great read-aloud book for the preschool to first grade set. There's a very good index at the end of the book with proper pronunciations of all the dinosaur names that will have your preschool paleontologist rattling them off like a pro. Highly recommended for all children between three and six.