Yes, the fascination of the weekend was police helicopters.
We went to the local police station open house on Saturday and the "coolest" thing, per Natalie and Nicholas, was the police helicopter. They got to see inside and -- while we were waiting in line for a pony ride -- they got to see it take off, with siren blaring. "Very very cool", said Nicholas.
We spent three hours at the open house. Compared to last year's open house (where we spent a short time AND had an injury on the moon bouce) it was amazing. Both kids had a ball. Thank you, Fairfax County Police Department!