well, my husband used to put bottlecaps on his hat by pushing a bottle ring (the plastic ring below the lid on a plastic soda bottle) into the cap with the hat in-between the two (get it?). or you could make them into a hemp necklace, I've seen that done.
and looks like you have all the ingredients for a cool magnet, just glue a picture to the flat back marble (maybe one of your stickers?) and then glue a magnent to the back of that...
and I used to wear bracelets/chokers out of paper-clips all the time. just connect them all, nothing fancy.
and you can send me the gold earrings!