Did you hear Tooth Fairy Trivia at 7:10 on The Froggy Family Breakfast Club? She's getting more generous. A poll by Visa found American kids get an average of $3.70 for each tooth. That's a net return of 74 bucks for a full set of 20 baby teeth. Last year, the average was $3. 6% of children find a 20-dollar bill under their pillow...and 2% get a $50! What's the most you ever got from the Tooth Fairy?