In this large format book, children can test their powers of observation and practice doing additions. The most prevalent dinosaurs and reptiles of the Prehistoric Age are depicted in Agnese Baruzzi's richly detailed, full page illustrations. The children must find the animals, count them and write down their results in the designated area on the margin of the page. How many dinosaurs can they find on each page? The correct answers are on the last page of the book so that the children can check their work. Entertaining and educational at the same time, this big book will give hours of fun to its young readers. Ages: 7 plus