When deciding what to do next seven-year-old Carolyn asked, “Do I have time to do this before my piano lesson?”

“Your lesson isn’t until 4:00. It’s only 10:00 now.”

“Well, is that enough time?”

I pointed to the clock and explained how the hours passed, the distance between 10:00 and 4:00. “That’s five hours.”

She said, “I know how to tell time and all that on digital and analog clocks, but I don’t comprehend it. What is five hours?”