The cornucopia, also known as the Horn of Plenty, is typically associated with Harvest and Thanksgiving. Today you might see it as a centerpiece of decoration on Thanksgiving made of cone or horn-shaped wicker basket with real or fake fruit and vegetables inside. You might even make one as a Thanksgiving craft.
The original cornucopia, however, was from Greek history, and was made of a Goat's horn! According to Greek mythology, Zeus gave his nymph nurses the horn from the goat whose milk he drank as a child, and it would magically fill with whatever the owner desired.