Brass Ring

A brass ring is a small, grabbable ring that a dispenser presents to a carousel rider during the course of a ride. These dispensers are filled with a large number of iron or steel rings and a single or a few brass rings. The rings can then be tossed at a target as the carousel rotates. Typically, a brass ring can be traded for a prize, which is often a free repeat ride. Although they were standard... (Wikipedia)