"Mom, why do most people on our block drive to school?"

We spent our walk coming up with reasons why we drive places instead of walk. Sometimes it's too cold or rainy, sometimes it's too far. Sometimes we have too much to carry. Figuring out why our family drives to the grocery store was pretty easy for Miss K. Understanding that other people draw their lines on "too far/heavy/cold" differently than we do was much more difficult to understand.