Poison Arms

In early Europe, it was a tradition to bury baby teeth that fell out.^[2] Some believe that the Tooth Fairy evolved from the tooth mouse depicted in an 18th century French language fairy tale. In "La Bonne Petite Souris," a mouse changes into a fairy to help a good queen defeat an evil king by hiding under his pillow to torture him and knocking out all his teeth.

Worry dolls are told a worry by children and placed under their pillow. During the night the doll is believed to worry so that the child can sleep, and sometimes to actually address or resolve the worry. As with the tooth fairy, parents may remove the doll at night to reinforce the child's belief in the myth.