Card Opened (sorry, should have opened it up more so you can see. I simply stamped the back of it but I can see putting candy, gift cards, or any other kind of small item inside. I saw one on Valita's blog done for Christmas and inside it were about 4 hand made paper ornaments.
There is no sense of re-inventing the card. Valita has a video and instruction on how to make a simple box card on her blog, Valita's Designs & Fresh Folds.