Treat Balls: Cover small balloons with one layer of orange tissue paper and then one layer of yellow. Cut out your own shapes, or download and print our silhouettes, then trace them onto black tissue paper; cut out each shape. Affix the silhouettes to spheres with diluted glue. When dry, enlarge knot holes (start cutting with utility knife, then finish with scissors). For party favors, fill balls with candy and tiny toys; paste a circle of orange tissue paper over the hole.