The prices in the diner where the kids are hiding are in Canadian dollars but are still astronomical, with a 17 dollar hamburger and a 70 dollar pint of ice cream.
When the sisters first hide in the basement, the middle sister ties a rope around the doorknob and then around a post. Supposedly for added security, but the door opens in so the rope won't help.
In the police station, the map on the wall is of Guemes Island, Washington.