I'd say teasel. The pockets of water are interesting, as the plant can gain nutrients from dead insects that drown in them. Not as exciting to watch as a Venus Fly Trap or sundew, but still a neat trick. They are getting rarer nowadays (carder's Teasel has curved spines, and was widely grown for teasing wool thread... I suspect that's where the name comes from, but I don't know that)
It's a lovely plant, and well worth growing if you have some space.