Paper 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.
Alexander Calder inspired mobile - tissue paper and wire. This may be the answer to my mobile dilemma. I found corrugated cardboard is too hard for kids to cut. Thin wire and tissue should be a bit easier.