All you need to get started are blank cards, an old calendar, scissors, glue, and a good latte. Because a good latte makes everything better.
Glue your shapes onto the front of your cards. You're all set to remind someone of the joys of snail mail!
p.s. Alan's grandma and I send each other notes through the mail -- it's always lots of fun to get something in the mailbox that's not a bill :)