While "Bear in There" itself is not a limerick, it shares some of the characteristics of free verse poetry, such as:
* No strict rhyme scheme: While "Bear in There" does have some rhyme, it's not consistent throughout the poem.
* No fixed meter: The rhythm and number of syllables per line vary throughout the poem.
* Focus on imagery and wordplay: The poem uses vivid imagery and playful language to tell its story.
Overall, "Bear in There" is a good example of Shel Silverstein's signature style of playful and imaginative free verse poetry.