A penny slot machine is a form of gambling machine that uses penny values to determine the number of lines used in the game. They accept paper money and dispense winnings in the form of tickets.

Penny slot machines are played by inserting the desired amount of money into a bill slot that converts that money digitally into penny values or credits equal to the amount of money given. Players can increase the number of lines used for each spin by using the credits, which can slightly increase their chance of winning with each line. When a winning player is finished with the machine, they get a ticket. This ticket can then be exchanged for the amount of money the player won.