The quickest way to get FBC's is to go through your Account Settings and down to Payments. You will have to register a few details (e.g. Paypal or Credit Card) in order to purchase them.
However there is a way to get them free through a recognised site called 4Loot.com.
http://www.4loot.com/
It will take you time to accumulate enough points to purchase your FBC's, however there is a number of different ways that you can do this. (E.g. Birthday Blitz & Word Dash)
When you have 65 coins you can spend them and get 2 FBC's.
When you have 250 coins you can spend them and get 10 FBC's.
When you have 500 coins you can spend them and get 25 FBC's.
However there is a way to get them free through a recognised site called 4Loot.com.
http://www.4loot.com/
It will take you time to accumulate enough points to purchase your FBC's, however there is a number of different ways that you can do this. (E.g. Birthday Blitz & Word Dash)
When you have 65 coins you can spend them and get 2 FBC's.
When you have 250 coins you can spend them and get 10 FBC's.
When you have 500 coins you can spend them and get 25 FBC's.