Sig, again, fantastic! Great makeover. The aging of the wheels is also fantastic, I see your son inherited his father's talent. Only a true artist would have the patience to play in the sand pit for months just to get the right weathering effects on those wheels.
So you are an architect/designer, this explains the easiness you had to create your make believe town. I confess that I was surprised by the way you made the buildings and colouring of the walls in your town. It is different from what we usually see here. It is more "simple" and "rough" but more real at the same time more real. Being an architect by training gives you the perfect answer to your mother's worries: I realising my urbanistic dreams.