I just found out that one of the DT challenges at ScrapShotz this month is to make a z-fold card. It reminded me of the one I made just this past month. It's actually quite different, and more complicated, than the z-fold card challenge at ScrapShotz.
I found a new to me Canadian site - Stampin' Canada - a while back and they were having a VCD (Virtual Day Crop) when I joined so I joined in the fun as much as I could. One of the challenges was to make a z-fold card. I had never heard of these before and the sample they showed was so beautiful I simply couldn't resist trying it. These are z-fold cards with the added feature of being pop-ups. You can see samples near the end of the following blog posts - cute little monkey card and beautiful butterfly card.
Mine is not near as nice as those, but I'm pretty pleased with it just the same.