Archiver's had a make and take many weekends ago, and one of them allowed us to try making a card with clear acetate (kind of like heavy duty transparencies). I had seen this, too, on Hero Arts blog (lots of great ideas here!). I got sucked in, bought some acetate and stayzon ink in white. Here's the result:
I stamped a variety of flower stamps (all from the same set by Hero Arts) in white stayzon on the clear, then stuck a smaller white card inside where I stamped "Happy Anniversary." This way I can still write a message inside. I also used a little bling in the center of the flowers.