Many children await her arrival the way they would a visit from Santa Claus and the Easter Bunny.

The Tooth Fairy is the pixie that visits kids in the middle of the night, leaving money for a recently lost tooth. This week, on Thursday, Aug. 22, we'll celebrate Tooth Fairy Day.

But what do we know about this mythical creature — and how much is she paying out for teeth these days?

A Norse beginning

The Tooth Fairy might have had its origins in early Europe, when baby teeth were buried to spare the child from hardships in the next life. Other Vikings are said to have brought their children's baby teeth into battle with them to bring them good luck.

WDAY logo
listen live
watch live

RELATED: The Monday Mark: what exactly is CBD and why is it so popular?

The first fairy might have been a mouse

According to 123Dentist, mice have been associated with the Tooth Fairy, particularly in Spain, Russia and Asian countries.

"The reason for the mouse being synonymous with so many culture’s tooth fairy tradition is the fact that rodents continue to grow their teeth their entire lives. Anthropologists consider a type of ‘sympathetic magic’ a way for believers to transfer good luck or traits to the child who lost the tooth," according to the website.

RELATED: The Monday Mark: The 'wrong way' pilot who knew exactly where he was going

Modern-day Tooth Fairy was born in the 20th century

A book about the Tooth Fairy published in 1927 is believed to have popularized the version of the magical creature we embrace today, a pixie-like young woman. As Disney started featuring pixies in their films in the mid-20th century, the Tooth Fairy maintained its popularity.

What is a tooth worth these days?

It might be one of the most-asked questions new parents have for more experienced parents: "How much is the Tooth Fairy supposed to leave?"

According to The Original Tooth Fairy Poll by Delta Dental, the average amount American children get is $3.70 for each tooth.

Other holidays this week

  • Monday, Aug. 19: Aviation Day
  • Tuesday, Aug. 20: Chocolate Pecan Pie Day
  • Wednesday, Aug. 21: Senior Citizen's Day
  • Thursday, Aug. 22: Pecan Torte Day
  • Friday, Aug. 23: Sponge Cake Day
  • Saturday, Aug. 24: Maryland Day
  • Sunday, Aug. 25: Banana Split Day