When you first think of Fixed Form poetry and Nonsense poetry, they seems like they couldn't be any more different. However, both are very interesting from a language point of view. For one you need a great grasp of the language, and for the other you need to be able to let that all go.
Below you find an example of one of the most famous nonsense poems; The Jabberwocky by Lewis Carol.
Lesson 4 - Fixed form and Nonsense Poetry