We were at The GRAND CANYON, WERE in a parking area. Jo was a toddler but talked very clearly. I picked her up to give her a better view of the canyon, She looked at it and said Who dug that whole?. I began a search though the side of the Canyon until she saw the small Colorado River at the bottom of the canyon , I tried to give her a good understanding of the history of the canyon, I finally got the very small river down at the bottom. I said that river dug it, She looked at me with deep disdain and Said Nuh hough!I sais OK god did it. she was satisfied! George