I was watching "Max and Ruby" with my daughter this morning and Max was riding around in a little car. I assumed it is a peddle car like I had when I was little. I started thinking about what kind of car would an AB own that would be a street legal peddle car.
I think it would be a "SMART CAR" convertable.
The other thing is a tricycle.
I think "Vespar" makes a three wheeler with a cab, but that isn't a large size tricycle. The other ones I think I have seen is a three wheeler but the two are in the front. I know there was a tricycle by honda back in the 80's. There was one in "Every which way but loose" but that was a passagenger style bike
If some one has custom building skills, think of the business opprotunity to make a street legal "Big wheel".