Since I've done many handphone and iPad case, I was thinking of making another craft. And then I thought of card holder. I was inspired by the air mail envelope. :D
You can put your ID card, bank card, Touch n' Go card, etc. Or you can use it as name card holder. Besides all these, you can even put some cash when you just need to go out to the shops nearby your house for example.
Oh, nearly forget to mention.
This air mail design is available for Passport Holder too! :D