This pop-up cake card is inspired by the Sizzix 3-tier cake pop-up die, as I don't have the die I decided to make it on my own (the card not the die!).....and I am happy with the way it has turned out. After I finished making it I also found a tutorial for it over here.
This is how the card front looks like. It has been kept shut with some magnetic tape.
Here's another look at the pop-up cake.