A craze believed by many to have originated when Yale students began to throw upsidedown pizza pans borrowed from a New Haven restaurant. The first plastic disks were developed by Fred Morrison and Warren Fancioni in the late 1940s. Frisbees were then mass produced in the late 1950s by the company Wham-O. As the craze grew in the 1960s, a new non-contact sport developed called “Ultimate,” in which the objective is to get the frisbee into the opposing team’s end zone. Ultimate is popular at the club level on most US college campuses.