This site has a bunch of Christmas tree ornament ideas using screen. DIY Christmas Ornament #5 • Heart Window Screens, Christmas Crafts, Diy Ornaments, Christmas Decor, Diy Christmas Ornaments, Christmas Trees Ornaments, Diy Christmas Tree, Ashbe Design, Christmas Tree Ornaments
Punch out 6 circles of either scrapbook paper, old Christmas cards, or wrapping paper. Fold the circles in half and paste them back-to-back. Before gluing the last circle in place, put hanging ribbon or string in center then glue.