Before a killing frost, harvest several carrots, beets, and turnips. Remove any unsightly leaves. Cut each vegetable crosswise, so that about two inches remains below the leaves. Arrange in a dish containing a layer of pebbles or a pebble/sand mix. Add a piece of charcoal. Fill dish half full of water. Place in a bright window and keep water level constant. You now have an interesting foliar display that is sure to draw comments.