If you have not read Where the Sidewalk Ends, or have not read it in a long time, I highly recommend you do.  Shel Silverstein is in possession of a unique brilliance and this title, in particular, is evidence of that.  It is a literary treasure.  Read it aloud cover to cover. I have a few Silverstein books that I read to my daughter at night.  This is my unquestioned favorite.  It is a bit dark and long winded in some places for a three-year-old, but she definitely enjoys it. When you have finished that I advise you to look up the musical credits for Silverstein.