Julie had this terrific tutorial for what I call a sliding gift card - you can check out hers here. Be sure to take some time to check out the rest of her work too, her stuff is just amazing! I took her instructions and modified them a little to make a Cricut Cut File. This cut file was designed on Plantin Schoolbook. Once the file is cut, you have to make scores on the 5x11 (long side) at 4 1/4" and again at 8 1/2". On the smaller piece (inset) you will need to make a vertical score where the cut pieces would meet. Download the cut file HERE.
The part above tucks in the pocket so when the card is closed, it is hidden and when it is opened, the gift card is exposed!
NOTE: For the cut file, you will need to hide the inside contours of the "U" tabs (shown in middle photo). To do this, set your page view at 200% and move down to the area with the "U" shapes. Click the inside area of the "U" and right-click and choose Hide Contour. Do this on each shape and then cut the file. You will have to do this each time you open the file. The cut file will work without hiding the insides, it just looks better with them hidden :)