
Once upon a time, there was a big ugly storm coming. Two sisters, one old and one young, were stuck at home. 
The older sister said to the younger, "Let's test how strong the door is to make sure it is safe."
The little sister watched her sister with curiosity as she tested the door. She asked, "What are you doing?"
"I am making sure our door is strong so that the storm can't blow it open," the older sister replied.
The younger sister thought for a moment and then said, "I'm glad we tested it so it's safe." 
The older sister smiled and said, "Me too." 
The sisters wrapped themselves up in blankets and watched the storm through the window. In the end, their door was strong enough to resist the ugly storm.
