Witch hats are classic symbols of Halloween, but they are usually worn by or hung on a wall. That is too safe. Instead, make your witch hats float. Choose a variety of black, tattered hats in different sizes—old straw hats painted black, velvet cones, or cheap plastic hats with uneven brims. Cut several layers of black tulle or netting to look like a witch’s skirts and swirl them around the bases of the hats. Bunch the tulle so it looks like the witches are in mid-disappearance, then hang them from high points using fishing line at different levels. The effect is a group of witches who are only partially invisible, their hats hovering ominously above your porch.

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