I have just discovered a very nice Facebook site for a dental practise that is on a mission to get kids and parents to look after their teeth better. They're running tooth related quizes every few days and you can win various things to help you look after your teeth.
Go to Facebook and search for Borehamwood Dental Practice and click like...
Here is the link...
www.facebook.com/#!/profile.php?id=100002926847717