This entertaining little activity book is chock-full of prehistoric beasts for young puzzle fans. Dinosaur lovers can identify the differences between two detailed pictures of Anatosaurus, Triceratops, and 25 other dinosaur duos. Each whimsical illustration can also be colored for even more fun. Solutions appear at the end. Dover Original. Age Recommendations: 8-11 Page Count: 64 pages Dimensions: 4 3/16 x 5 5/8