Numismatics is the study and collection of coins and other objects that have value because of their design and rarity. People who study or collect coins, stamps, and other money-like objects are called numismatists. Collecting coins and other money-like objects can be a fun hobby. Some people collect coins because they like the designs, while others want to build a valuable collection of rare coins. People who collect coins and other money-like objects can also research their history and value to learn more.