A penny is a small coin that is worth one cent in the United States. It is made mostly of copper and zinc and features the image of Abraham Lincoln on one side. Pennies are often used in everyday transactions, but many people find them less useful because they are worth so little. Despite their low value, pennies can still be collected by enthusiasts. Some people enjoy searching for rare or old pennies, which can be worth much more than their face value. Collecting coins, including pennies, is a fun hobby that teaches about history and money.