Freddie and Flossie are twins. Snap is their dog. They like to play catch together -- until Snap decides it's time to play chase! <P> Ready-to-read books offer children a world of possibilities at four different reading levels: <P> <EM>Recognizing Words</EM> <P> &#149 Word repetition <P> &#149 Familiar words and phrases <P> &#149 Simple sentences <P> <EM>Starting to Read</EM> <P> &#149 Simple stories <P> &#149 Increased vocabulary <P> &#149 Longer sentences <P> <EM>Reading Independently</EM> <P> &#149 More complex stories <P> &#149 Varied sentence structure <P> &#149 Paragraphs and short chapters <P> <EM>Reading Proficiently</EM> <P> &#149 Rich vocabulary <P> &#149 More challenging stories <P> &#149 Longer chapters