A very good idea, not quite simple enough in development. Pages of the book are folded over so that the answer to the question posed by each picture, is found when the flap of the picture is opened out. Various ways of travel and transportation, including such remote methods as camels and elephants and submarines, and omitting (here is the weakness of the book) automobiles, trains, subways, bicycles. The Rey pictures are gay and amusing, with lots of detail that children enjoy examining.