I will show how to build a Christmas popup card that features a Fractal decomposition of images. You can fit your personal photos and pictures, so that the whole renders as a Christmas tree.
It takes about 1 hour to prepare the card (I did it on PowerPoint, and the file is available if you want to start from something already half-done).
For each card the cutting/folding is about 10 minutes per card. I sent about 12 of them, only one fooled up.