Richard Schmidt, has been practicing dental hygienist for over 15 years and is currently in New York. HARRY AND THE PLAQUE PIXIE is the second in his Plaque Pixie children's book series designed to offer children ages 6-11 a light hearted lesson in oral hygiene. Also available is HARRY'S BIG DAY at the dentist, which shows children ages 4-8 what to expect during a typical dental appointment.