A desperate plea

So I have apparently been put in charge of the craft activity for the Valentine's Day party at C's preschool. Based on my previous performances in the arts and crafts department, I'm a little unclear exactly what the teachers hope to accomplish here beyond humiliating me in front of all of C's friends and the other mommies, but apparently "it's my turn."

Please, oh please, will someone with more talent and creativity than I offer up a suggestion of what art project I can possibly accomplish with 14 three to four year olds in the space of 15 minutes that somehow relates to my least favorite holiday. And preferably one that doesn't involve scissors...