When I posted photos of a "Magic Box" in my gallery there were some requests for a tutorial. As I did not know that there was a sub-forum for tutorials I thought I couldn't post it, but since I have now found it, here it is.
The document contains photos from start to finish, but here's my finished one from the gallery:
Magic Box by TMaja - Cards and Paper Crafts at Splitcoaststampers
I hope you like the tutorial and find it useful.