When four siblings wish on a star, each gets only a fraction of what he or she wanted, but when they combine their wishes, they just might get a whole new pet.
Rhymed text tells a hypothetical story about a Giraffe, and the many things that could happen to this giraffe...IF. The poems starts with "If you had a giraffe..." and continues by building along these lines with all sorts of different "ifs" and their conclusions.
I used to go to the library all the time when I was a kid. As a teenager, I got a book on how to write jokes at the library, and that, in turn, launched my comedy career.