Lay Styrofoam balls on newspaper on an outside work table or floor protected with newspapers. Spray the balls with metallic paint and let them dry. Turn each over and spray the unpainted sides until each ball is completely painted. Let them dry. Place them on a tray and take them indoors to decorate.
Take a straight pin and slip a few beads on it. If desired, add a tiny decorative star as well.
Hold two overlapping ends of a satin ribbon strip on any part of a Styrofoam ball. Insert the beaded straight pin from Step 2 through both ribbon ends, push it in as far as it will go, and secure it to the ball.
Take another straight pin and add a few more beads, and another star if desired, and then push the pin in near the first pin on the Styrofoam ball as far as it will go. Continue beading straight pins and pushing them into the Styrofoam ball until the ball is evenly, and completely, covered with beads on straight pins.