A "novelty act" refers to something or someone that is unusual, unique, or different from what is typically seen or expected. It may be entertaining or interesting because it is new, strange, or unexpected. Full definition
By briefly profiling each, the filmmakers ensure we care about them all; they are not treated as some sort of novelty act for the sake of the camera, and this is what makes the film a standout (rottentomatoes.com)
July 28, 2014 • A man out of time, Pokey LaFarge never feels like a mere novelty act. (npr.org)