In the 1950s and 1960s, he took his physical clowning & acrobatic act all across the United States becoming one of the top draws in show business. He also performed on television variety shows, including the Frank Sinatra Show, The Ed Sullivan Show, Hollywood Palaceand the Jackie Gleason Show. He toured internationally performing lavish shows in the United Kingdom, France and Japan before settling down for several years as a regular performer in the Folies Bergère.
Griswold's interest in trampolining and education did not stop with the development of his entertainment career. In 1941, he wrote Trampoline Tumbling, the first textbook for the sport of trampolining
