Morrison claimed that the original idea for a flying disc toy came to him in 1937, while throwing a popcorn can lid with his girlfriend, Lu, whom he later married. The popcorn lid soon dented which led to the discovery that cake pans flew better and were more common. Morrison and Lu developed a little business selling "Flyin' Cake Pans" on the beaches of Santa Monica, California.
In 1946, he sketched out a design (called the Whirlo-Way) for the world's first flying disc. In 1948 an investor, Warren Franscioni, paid for molding the design in plastic. They named it the Flyin-Saucer. In 1954, Fred bought more of the Saucers from the original molders to sell at local fairs, but found he could produce his own disc more cheaply. In 1955, he and Lu designed the Pluto Platter, the archetype of all modern flying discs. On January 23, 1957, they sold the rights for the Pluto Platter to the Wham-O toy company. Initially Wham-O marketed the toy as the "Pluto Platter", but in 1958 they added the name Frisbee, a misspelling of the name of the Frisbie Pie Company.
Morrison died in his home at the age of 90 on February 9, 2010.