I had a couple of heavy cardboard tubes 4" x 1" that wanted to be in the erosion project too. I covered them with handmade paper and text, paper mesh, a wine lable, ribbon, twine, wool, beads, measuring tape, earrings, washers, hand made paper beads, a tiny worry doll and misc. ephemera.
I placed them in a muslin bag and tied it up with twine
Now just have to find a place or places to hang them, preferably somewhere they can be seen from a window.