Asking just out of pure curiosity! I'm 16, and I've currently been to 15 countries, although some very briefly.
Norway (were I live)
Sweden
Denmark
Germany
England
France
Monaco (stopped by while driving from Nice in France to Asti in Italy)
Belgium (at the airport only)
Switserland
Austria (drove trough for a couple of hours while going from Germany to Switzerland)
Italy
Greece
Spain
USA
Canada