The stunt show is a great mix of effects and impressive stunts that make the show a true "sight to see". You even get a chance to see how some of the scenes in movies are created, such as a backward facing car (you'll see it in the show).
Pixar's Lightning McQueen and Tow Mater also make appearances at the show, and I have often wondered why Disney does not go ahead and do the true "Disney" thing by making it a show that features several characters from the movies doing these stunts.
No matter Cars themed or not, kids will still enjoy the stunts that are spread throughout the show. My sister took my one-year old nephew earlier this summer and he was completely infatuated with the show.