One more suggestion for Valentines' day: paper roses. DIY Maven give all the instructions of How to Fold a Paper Rose, with links to two tutorials, WikiHow and bloom4ever, and a video showing step by step of this not so papercraft work. For a final touch watch the videos of origamixpunk and follow the instructions. It's tough, but I bet it will worth in the end. (via !marty finestone’s activitybook)

BTW, I have a silly suggestion for a card to accompany the flowers:

Roses are #FF0000
Violets are #0000FF
All my base
Are belong to you