Do you want a quick, but cute Valentine's day card? I've got just the thing, with this svg file generation of a Martha Stewart Craft project demonstrated on her show. Here is the link to Martha's video and instructions, you might need them. I always get confused doing pop-ups.
Closed the card looks like this:
When opened, the couple Pop_UP and give each other a hug.
Of course, you can add your own message and embellishments, to the basic card. If you are lucky, you'll have some photos you can cut and put on their heads.