The Tooth Fairy must be pretty rich, despite all that money given out to children on their pillows every night. The MoBa Tann facility, run by professors Kristin Klock and Helene Meyer Tvinnereim might be described as the Tooth Fairy's 'bank'. This biobank stores over 17,000 milk teeth that have been donated by children and their parents for research: They want to study how pollution and nutrition affect to children's health.