How does ZZ Packer use simile in the short-story, Brownies?

Similes come naturally to Laurel, the lively, observant first-person narrator of the story. Mrs. Hedy wags her finger “like a windshield wiper,” for example. The similarity between the finger and the windshield wiper is based on the regular, repetitive, rhythmic motion of both. The leader of Troop 909 holds a banana in front of her “like a microphone,” the similarity between banana and microphone based on the shape of the object and the way it is held. The shape and color of the dissimilar objects being compared are at the basis of the simile that occurs to Laurel in the bathroom: “Shaggy white balls of paper towels sat on the sinktops in a line like corsages on display.” Other similes include the tree branches that “looked like arms sprouting menacing hands”; the girl who flaps her hand “like a bird with a broken wing”; and Mrs. Margolin with her Brownie troop following behind her “like a brood of obedient ducklings.”