Jana, has done a couple of these 3-D pop up cards. Stampin Success had a bunch of 3-D cards in last issue. I am hosting a class on August 26th, making 4 different types of 3-D cards. This is my last sample, I finally got around to making. I am offering a long-distance kit for $15 which includes everything to make 4 cards plus directions. You just have to assemble.
Here is the card folded up. The cool thing about these 3-D cards they go into a regular greeting card envelope.
I chose to use "crazy for cupcakes" but options are endless!