Oop's laughter could stem from both the humorous incongruity of nursery rhymes and the delight in creative language play. Examples like the satirical nursery rhyme and Humpty Dumpty's absurd translations illustrate these concepts.
Oop's laughter upon reading the first nursery rhyme can be explained by two main reasons. First, the humorous incongruity found in nursery rhymes can evoke laughter because of the unexpected or nonsensical elements they often contain. Second, the appreciation of the creative use of language and the delight in the playful sounds and rhythms can provoke a lighthearted response.
For example, consider the satirical nursery rhyme that references Charles Dickens' character, which brings a well-known figure into a childlike format, or the absurd translations in Humpy Dumpty's rendition of Jabberwocky that destroy the charming puzzlement of the original poem and turn it into something comical. Both reasons relate to the broader notion of how poetry and humor intersect, as explained in the given references to the pleasure derived from imitation and the artful pattern in poetry.