My boys are 10 and 7 - last year we did 50's Prime Time Cafe. They loved the waitress "Mom" with attitude. Mostly she was giving the "Grumpy Grampa" at the next table a hard time about not finishing his meal. I think they loved seeing an older person getting scolded. They are pretty well mannered (for boys that age) and they were just starring at the next table. The waitress was also really funny with our table. It's just a different experience. We are going back in January and I made this ADR already. The only repeat restaurant on the trip.
Enjoy!