and I had to stop and listen carefully today to see if the police car was the source of the siren or a real one outside.
OP, every store (TRU, Target, Kohls, WM,) has different stuff. I've leaned toward the Ocean and City sets so that we'd have a more "complete" set of stuff to play with. For example, one DC is playing with the fire truck, another rolls in with the police car on the scene, and another zooms into the emergency with the helicopter (actually goes with the ocean set, but I told them rescue helicopters report to all emergencies). This is all happening of course, at the F-P Loving Family Dollhouse, where all sorts of emergencies break out.