I've just been going mini-crazy lately! To go with my micro cars that I built a few weeks ago, I made some micro-scale 4-story city "walkup" buildings. One building has window air conditioners, the other has HVAC on the roof. Down on the street there is a crosswalk sign, a no parking sign, and other litte details.

The whole thing is only about 6 inches tall and 5 inches wide. This was just an experiment, but I might just do a whole city this way...

Here is a close up of some "people" crossing at a crosswalk. You can also see the traffic lights, and crosswalk signal, as well as a cargo van and a taxi.