Esp. to those who have had children:
A long time ago, I was with a friend and his young daughter, and I guess she couldnt' wait, because we parked in a deserted parking lot and, behind the car, she did her business, I guess in a portable potty that he carried in the car's trunk.
She was old enough to walk, and we'd been to the zoo without a stroller, so that means she's older than ?? months?
And her father carried a potty with him in the car, so that means she's younger than ?? months?