I came across a vendor at the show I took Gleek to last month who was selling catnip greeting cards. Has anyone seen these? I thought they were a fun idea, but a little pricey ($4 each). My husband surprised us with one at the end of the show so I was able to take a closer look. The handmade paper is embedded with catnip and are decorated with edible ink. Once you are done with the card you crumple it into a ball which reactivates the catnip and your cat can bat it around tear it up. Gleek had fun with his "Congratulations" card.