After we had been there a while, I said to GIRL that I wondered what time it was. She asked why we couldn't make a sundial to tell the time. So, I took a straight stick, held it over a flat rock, and guessed that it was somewhere near 1pm. I showed her where the line fell, and where it would be for 3pm and 6pm. A few minutes later, I asked BOY's friend what time it was. And it was 1:17pm! I was impressed with GIRL's inspiration. I am continually struck with how much I learn from my children.