A quilled flower set in the middle of this would make a pretty ornament! Just thread a cord through one of the inside of the tubes and pull it through the top, for a hanger. I would make single layers, if I were making an ornament.
vintage paper trees made from a half circle. would be so cute on canvas art, as garland or on packages or cards. Picture only but would be easy, just fold half circle back and forth on itself. Add ribbon or more paper for trunk.