I spotted those cute tea wallets from Knitting Iris Flickrstream this weekend, and nearly fell off my chair. I love tea, I drink a lot of it, mostly because of an annoying sensitivity to caffeine that rules even the most basic soda pop out of my diet. This is just perfect, no more dirt tasting herbal concoctions to stomach for me!
The free pattern also explain how to make them for credit cards, they would make a great project to try out with the students, this could get out of hand really fast!
I modified the pattern a little using ponytail elastics, it speeds things up a notch. Those also are sans-interfacing, being made of linen and all, quite stiff enough as it is.