This will be a useful book to tie in as supplementary reading with primary history of prehistoric man. The factual background is based on the group in the Field Museum in Chicago, and the story is planned to give an idea of how first things were made :- a ""boat"" was developed by the chance discovery that a log could be poled by a long stick; an ""exe"" was invented when a pointed stick lodged itself in a stone, and together they did a job the stick could not have done alone. In brief text and lots of pictures this story is told.