Wear your Halloween best and get a free doughnut at participating Krispy Kremes in the Chicago area on Halloween. You’ll need to wear a costume to a participating Krispy Kreme location on October 31, 2011, to get the hauntingly delicious free doughnut (click at bottom for more info). Note that the freebie applies to the Halloween or Pumpkin Spice doughnuts only. This Halloween, Krispy Kreme Doughnuts features three Krispy Skremes items, including the Jack-o-Lantern Doughnut, a pumpkin-shaped doughnut with orange icing and a jack-o-lantern face; the Spider Web Doughnut, a chocolate-iced doughnut with Kreme filling and web icing; and the Chocolate Iced with Halloween Sprinkles Doughnut. Also, Krispy Kreme is offering Halloween-themed game ideas at KrispySkremes.com. Thanks to Free Things to Do in Houston and Free Things to Do in New Yorkfor this yummy freebie!