We think that cars made it on the radar when we got a second carseat to put in Roland's car. He started saying, "Dada's car" and didn't object to going out with Roland without me (at the time he was still very attached).
I was teaching him the alphabet while this car curiosity grew. One day S was getting out of his stroller which I parked behind Roland's car. Suddenly a lightbulb turned on. He excited pointed to the car and yelled, "H!!! Dada's H car!!" Thus his ability to identify Honda's. What I'm trying to figure out, though, is how he can identify a Honda by seeing a profile of the car or an angle that doesn't show the 'H'.