Excerpt:
The carousel originated in Europe, but reached its greatest fame in America in the 1900's. The first carousels featured gondolas, carts, menagerie animals, and horses. The French developed many variations of the carousel. In one variation, the riders tried to spear gold rings with lances while the carousel rotated at full speed. This undoubtedly led to the phrase, "catching the brass ring" on later carousels.

