Faerie Tale Theatre (1982)

Theres a sucker born every minute -- and 2 con men (Art Carney and Alan Arkin) find as they ride into a seaside town that it is run by the most vain King alive. The 2 set up a scheme to rob the king of his jewels and Robes! -- as they come peddling a magical cloth that any person who is truly stupid cannot see! A humorous comedy with a great moral for the entire family.