Now if you fold the middle up and gently peel it apart you have a secret section for your message. I haven't written my message yet as it's a secret! It's a really easy card to make and it amazes me how it works. It's just one piece of card stock folded and cut but it looks like you've done pages.
If anyone would like a tutorial on this please leave me a comment, if I know people are going to look at it I will make one and post it.