The plastic bread ties - dd and I made wreaths with them a few years ago using tinsel.

I recall making a wreath in school out of a wire coat hanger bent into a circle and a green garbage bag torn into lot of strips that we tied around the wire. Things like funnies to decorate.

Also old newspaper is great for paper mâché. Draw the shape on cardboard and build up from that if you like. Then paint and hang.