I second "Flights of Wonder" as a hidden gem. Its funny, cute, and surprisingly touching ... i get all choked up when they bring out the Bald Eagle.
I've seen it twice this year (8/09 and 2/10) after skipping it for years ... both shows the CMs were excellent, show was slightly different, so even if you have seen if before, give it another chance. In 2/10, a local bird (one of those white egert-y things) hopped up on stage unexpectedly, CM handled it so well ... made jokes about "auditions were on tuesdays." It was hilarious!