Children poetry starter - Dr. Seuss

When I was a child, my mom had borrowed me a library book called "Green Eggs and Ham." I remember very vividly my impression on this book after reading it - I didn't like it, for 2 reasons. 1) The look of the characters are really bizarre. 2) I had no idea what the book was about!  The first part of the book begins like this:
I am Sam
I am SamSam I am
That Sam-I-amThat Sam-I-am!I do not likethat