According to a new study, the tooth fairy has been a little more generous this year.

The survey, from Visa, says the tooth fair left an average of $3 per tooth in 2012. Some kids found up to $20 under their pillow. Wow!!

Parents, need help figuring out how much a tooth is worth? Visa has released a Tooth Fair Calculator app that will tell you much a tooth is worth based on your gender, education, location, age and income. A parent can also look and see how much a tooth was worth then they were a kid. The app is available for iphones, ipads and online at Visa's Facebook page.