This year we decided to go with a ninja theme for our boy Valentine's. We ordered these cute bendable ninjas from Oriental Trading Company. They come in 12 packs, so it was the perfect size for an elementary class. I designed the Valentine's in Word. I just googled a grey chevron background and then typed on top. It turned out to be a quick and easy Valentine project compared to some of ours in the past!
We just hot glued the ninjas on and they were ready to go. Good luck on your Valentine's!