My kids have a little hand-held device called the ya-da-ya-da-ya-da voice changer. They press a little button to record their voice, and then they play it back. It can be played back in a normal mode, a faster high-pitched mode, or a slower deep mode.
They decided to bring this little device in the car. What do you think they did with it? Well, they recorded themselves crying and screaming like babies. Then they played it back on the higher pitch. Why? They wanted to hear what they sounded like as babies.
I really didn't need to hear that. I for one, remember quite well what they sounded like as crying babies!