Two found poem ideas for those who have a hard time coming up with their own words:
Search Twitter for #spinepoems (without the kids watching) and you'll find a ton of great examples for an easy activity easily done either in the library or the classroom collection. Here's one I made:
Because call numbers...
three times lucky
okay for now
a small white scar
Blackout poems a la Austin Kleon. Librarian Jennifer Reed has a great article about using an old copy of a Harry Potter book with fifth graders to make blackout poems.