My little sister
One day, I noticed how if you blew into the end of a copper pipe, and alternately took a fitting on the end on and off, it would change pitch.
I decided to show this to my sister, who was an impressionable four year old.
"Here, blow in this, and I'll pull the end off. Listen to the sound it makes!"
She dutifully holds the pipe to her mouth, and blows. I try to pull the end off, but it sticks. I then try harder.
The rebound chipped her tooth. I was horrified! But it did make a much different sound at the end, kind of like a four-year-old screaming.
(w4I4q1O1 was hard at work on, Fri 19 Sep 2008, 16:37, Reply)