Walk Score on Zillow

Just checking up to see what our house is listed as on Zillow and came across our "Walking Score". We received a 57, which is described as "somewhat walkable". I think our rating on this may go up, as we now have a high end grocery store within walking distance. Now with children, I am finding that they like to walk places. The only thing I don't think of is that I have to carry what I buy back. Two gallons of milk sounds like a good idea until I step out the door and remember I didn't bring a car.