In the book, Scritch Scratch, by Miriam Moss, one little louse finds a home and hatches a large family in Ms. Calypool's classroom. A great deal of scratching follows.

These pesky things like to make thier homes on humans. They really like to nest in people's hair. Lice have no wings, like fleas. They can make you itch like you have fleas, if they decide to start a nest on your head.