21!
Buy packs of playing cards in all sizes to use as embellishments on your paper art projects. The birthday card at right is one of my favorites for ages 10 to 50. This card used tiny playing cards layered over a metallic background that has been stamped with a birthday greeting. The hand is a Sizzix die cut but there are punches and stamps in that shape as well. I distressed the playing cards with sandpaper and ink. Used ink distress on all the paper layers, ran the hand through a crinkler, and glued a gemstone to the ring finger. There are loads of variations for this.