There are plenty of tokens used on fun fairs, such as in coin pushers, arcades, ride tokens, etc.
The recommended type of token depends on the application. Coin pusher tokens should be made of a non-magnetic alloy whereas the requirements for ride tokens are far less stringent.
At fun fairs shiny silver colored tokens are most popular as their appeal invites to customers to play. Hence, nickel plated brass is by far the most popular choice.