Just one of dem things.
Elementary schools. High-tech retnal scans.
But best of all, you gotta somehow ask your 1st grader to 'get you on the list', or go to this more 'serious' story on the same topic:
Scary, or just the sign of the times?
If you are registered in the middle school or two other elementary schools in Freehold Borough (NJ), you can stare into an iris-scanning camera and the doors will automatically unlock.
Mmm. Mmmm...indeed! Go to the source for more details.