So, this is many ages ago...but I remember it a bit, I had a relative from Finland who came to visit, and the relatives daughter was with them. We had a bathroom lock which was weird, because it showed that it was locked but it wasn't. So the girl really needed to pee, and thought the door was locked...and ended up peeing in her panties...I don't recall what age I or she was...but about around 9years old I could guess.