Thanksgiving has many symbols. A cornucopia (kor-nuh-koh-pee-uh) is used often. It is shaped like a horn. It is also called a "horn of plenty." This is because it is full of food. People used to use a goat's horn. It was used at harvest festivals. It was a symbol of abundance, or plenty. They filled it with grains, flowers, and fruit. Today, small .....