Dyed pistachios -- and the telltale red lips and fingers you get from eating them -- went out of fashion in the seventies. Now they're back, this time as part of a valentine wreath. Begin by making a pattern: Cut a symmetrical heart from paper (this one is about 8 inches tall), then cut out the middle, leaving a heart-shaped ring with inch-wide edges. Trace pattern onto thick cardboard for the wreath form and onto red felt for the backing: Cut shapes out, and use household glue to attach the felt to the form. Color the edges of the cardboard with a red felt-tip pen. Next, heat up a glue gun, and glue pistachios to the cardboard as shown, beginning at the V-shaped top of the heart and pointing the open ends of the shells outward. Cover the entire cardboard surface. In crevices between the rows of pistachios, dab hot glue to secure pink peppercorns (available at specialty food stores). Glue a picture hanger on the back, and loop ribbon through.