Make 30 or 40 paper hearts from pink and red construction paper and mark several with special colors or stickers. These are the "prize hearts". Put the prize hearts along with all the other hearts or valentines into the middle of a blank (a red one would be best!). Then have the players hold onto all sides of the blanket and gently move the blanket and the valentines up and down. Then start a countdown and on the final count have all the player launch the valentines and hearts high up into the air and yell "Happy valentines day!". Then everyone scrambles to pick up as many as they can and whoever finds the "prize hearts" gets a small prize.