I loved this book when I was little. The adventures of a picky eater trying a bizarre new food with an infectious rhyme scheme had me begging anyone to read this book that I could convince, and is still one of my favorites.
Here's a little history behind Green Eggs and Ham, courtesy of Wikipedia:
Green Eggs and Ham that I read in one of my Spanish classes:
Green Eggs and Ham is one of Seuss's "Beginner Books", written in a very simple vocabulary for beginning readers. The vocabulary of the text consists of just fifty different words, of which 49 are monosyllabic (the one exception being "anywhere"). It averages 5.7 words per sentence and 1.02 syllables per word.
How cool is that?