Finally arrived and unpacked from the Denver Show: Cast anthills! Perhaps you've seen the process on YouTube - if not check it out here: https://www.youtube.com/watch?v=IGJ2jMZ-gaI. The three examples we have to offer are indeed all from fire ants, and very like the one in the video. The largest one is shaped roughly like a Christmas tree, and could perhaps be decorated for the season. These are all aluminum, and as they say on EBay, great conversation pieces.