Go here for the full details as well as the types of cards they're especially interested in receiving, and some helpful card guidelines.
Here's a shot of my cards that are on their way to Laurel. It's fun to imagine where the recipient of each card lives and how far each card will eventually travel.
If you have some extra cards, please consider sending them to Laurel. I know she'll appreciate them and you'll be rewarded with the feeling that you're helping to bring sunshine and smiles to others.