One of the concepts of print that young children are learning is that it is the black squiggles we call text that we actually read in a book.  We help them learn this by pointing to text as we read aloud, calling attention to the print in our environment and explaining it to them from time to time. 

Fortune Cookie by Albert Bitterman is a fun title to use for the purpose of teaching this concept.  Turn a page and one of seven fortune cookies is pictured with a tab to pull.  The tab represents the paper you find in cookies with a fortune on it.  Each fortune is out of view until you pull it out of the "cookie".