Do a naughty video (or a strip of photos) - doesn't have to be you, whatever you think floats her boat. Have a window in the front of the card that shows the first image (or frame) and when opened it plays. Theme: Your so nice, I'm so noteeeee: .
A card with a hole in it. From the top hangs a small heart out of steel that is iluminated from one or two LEDs from the bottom of the card. Another fine thing would be "the most useless Xmas card ever".
A card that closes itself after being opened. You could try to melt the acryl and create a card with two layers of acrylic. The greetings are melted in one layer.
Last year I milled a little key fob for my grilfriend. Just after Xmas she broke up with me, so no more selfmade items ;-).
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.