FB's are "Friendship Books" that are swapped by snail mail penpals. Each person that receives an FB enters their name in it, along with some of their interests, before passing it on to another person. When the book is filled, the last person to sign it returns the book to its owner. These books are a great way to find new snail mail penpals.
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Last update:November 21, 2014 at 9:15:08 UTC