What do you think of this one?
I had a customer request a Spiderman-themed card. Of course, I can't use real Spiderman imagery, but I purchased this stock imagery from iStockphoto which won her son's approval.
It's still a work in progress, but I am very pleased with how smooth the mechanism works already.
On the outside, it reads: "Guess who's turning four?" and when you pull the tab, you'll see a photo of the birthday boy (which I have yet to put in).
Still honing it up a bit, but the general idea is there!