Struwwelpeter

Struwwelpeter is the titel of a childrens book from 1844, which contain ten separat stories about children and their behavior. The stories often end with more or less extreme consequences for the children.

The Twelfth Doctor read the story of the Thumb-Sucker to the waifs of the Frost fair, to gain information about the sea creature beneath the ice. (TV: Thin Ice)