I discovered Pocket Pal Letters early this year in March 2016.
Besides the opportunity to write to Pen Pals from all over the world or just locally in your country, you create mini cards (9X6.5cm) that fit into a pocket of nine. Its a plastic sleeve that holds collector cards that you can buy at EB Game stores in Australia or online stores like Ebay or Amazon.
http://www.pocketletterpals.com/ is created by Janette Lane and is a network of Pen Pals. This is her description from her website:
Pocket Letters™ and Pocket Letter Pals were created by Janette of Janette Lane Blog as a new way to send and collect penpal letters. The concept is easy and fun! Pocket Letters are penpal letters in pocket format. Basically, you fill all the pockets of a 9 Pocket Page Protector (or similar) and send the whole page to someone who wants to swap or to your existing penpal(s). You fill the pockets with the components of a typical penpal letter. Items such as stickers, tea bags, ephemera, washi tape samples, and pictures can
be added. A letter is included and tucked into one of the pockets. The Pocket Letter folds up easily and is then sent to your Pocket Letter Pal in a standard 10 size envelope. It’s the perfect way to send and collect letters from other Pocket Letter Pals (i.e. people who are sending mail in this format) around the world. They also fit perfectly in a binder for easy storage! This can be a one-time exchange or you can swap Pocket Letters indefinitely.
If your into paper crafts, card making, art journalling, mixed media etc, you can apply these techniques to Pocket Letters in miniature form!
My techniques to creating the Pocket Letters are varied. I love writing a short letter and getting to know my Pocket Pal. You can join in events which is a theme for a Pocket Letter or search for a group that interests you and find a Pen Pal with similar tastes.
Some other blog sites that delved into Pocket Letters include:
Purple Mail Box: http://purplemailbox.blogspot.com.au/2016/02/pocket-letters.html?utm_source=feedburner&utm_medium=email&utm_campaign=Feed:+ArtsyCraftsyPursuitsOfOneSoaphouseMama+(Artsy+Craftsy+Pursuits+of+one+soapHOUSE+mama)
Art & Whimsy: http://artandwhimsy.net/category/pocket-letters/
Here are my efforts so far: