The girl finds her nose funny because of its peculiar shape and how it grows on her face, sticking out like a handle.
According to the provided reference, the poet feels that the nose is funny because it has a peculiar shape and funnily grows on the face. It seems odd and amusing how it's positioned right in the middle of the face. The reference also notes that it "sticks on the face in the form of a handle." This comparison highlights the nose's protruding shape, making it seem comical to the child. Even though the nose serves the important function of helping us breathe, the child still finds its appearance funny.
In essence, the perceived funniness stems from its unconventional form and placement, rather than its function.
