Where were zippers first made, and how did they get their name? How were fossils and stalactites formed, and where can you find some spectacular specimens? What was the original name of the Chicago Bears? By the end of their tour through the pages of Prairie Numbers, children will know those answers and much, much more.Counting their way through the state of Illinois, children discover the great city of Chicago, with its famous art and science museums, the Shedd Aquarium and the 110-storey Sears Tower. They will also find lakes, ponds, farmlands and prairies full of wildlife and flowers. Prairie Numbers tells children more about Illinois than they ever could imagine, and it entertains them every step of the way!