Observation.

William has proven time and time again that he intensely observes and studies his surroundings. So here is a perfect example. We have a volunteer fire department at the end of our neighborhood, that we drive by several times a week. As most of you know emergency vehicles back in to their garages and parking spots so they can get out faster. William is also obsessive about parking his cars. I am constantly finding groupings around the house of cars lined up and placed just so. This is what I found watching William play the other day.

Notice all the emergency vehicles are turned around backwards. I asked him why and he just looked at me, and bluntly said.... "because fire engines back in Mommy." All I could do was laugh.