Glass breaks when it is heated. That was the lesson my youngest daughter and her friends learned this morning. They wanted scrambled eggs for breakfast, so they pulled out a pan and several glass bowls. They mixed milk with their eggs and placed the bowls and the pan on the four burners of our stove. A little while later they were on the phone.
"Dad! Come quick! There's glass on the stove!"
Puzzled, I headed home. (I wasn't done with my work yet, so I was over at the church.) When I stepped through the front door, I was greeted by the smell of burnt food. I walked straight to the kitchen and found one of my older daughters clearing glass shards from the stove. Soon after my arrival, she stepped on a piece of glass, cutting her foot. I sent everyone who wasn't wearing shoes - that would be everyone but me - out of the kitchen while I cleaned up the mess.
When I was done, I became the girls' science teacher. "Glass is a liquid. It breaks when it is heated because it can't hold its shape. Don't ever put glass of any kind on the stove." End of lesson.
I think they'll remember this one. Now all I have to do is go buy a new set of glass bowls.