Where can i find addresses for penpals for a child ?

not e-mail addresses but actuall pen to paper addresses.
I'm 11 and I could probly be a pen pal. How old is your child?

I want a pen pal.
 tara i want a penpal sooooooooo bad r u taken cuz i want 1 and we could be pals by email and i am 11 to so that would be sooooo fun just please answer thanx by