I went on a search and turned up all sorts of treasures! ArtPlay also provided beads and tubes from a chainlink fence and various thrift store finds, like pot lids and colanders and even a toy zylophone. (The instructor used a hammer popped off the color pieces.) All you really need is some discards, a drill, some sort of twine or fishing line, and your imagination.
I made one that includes things near and dear to me: glass bottle, spool of tread, tiny book, picture frame, key... it makes me think of my mama. (Obviously for indoor display rather than outdoor.)
And here's what the kids created:
Cool, huh? I'm collecting things now to make a few more, probably for Christmas gifts. :)