A gumball machine is a vending device that dispenses small, round candies called gumballs. Typically made of glass and metal, these machines allow users to insert coins, turn a knob, or press a button to receive a gumball. They are often found in places like arcades, restaurants, and grocery stores. Gumball machines come in various sizes and designs, appealing to both children and adults. Some machines offer different types of candy or toys, while others are specifically designed for gumballs. They have been popular since the early 20th century and continue to be a fun treat for many.