I had posted something similar on my previous account. When I was, I believe, four, I was looking through a photo album. I saw all of these b & w pictures. I asked my grandma (who was the main photographer in our family), when did the world change to color? I figured, at that time, everything was in color, as were some of the pictures. Which meant, if some of the photos were b & w, then the world itself must have been as well, at some point. I thought that was pretty good logic for a little kid. What cute & clever things did you say when you were a child?
