As you can read from Wikipedia, The Fiat 500 Topolino was one of the smallest cars in the world at the time of its production. Launched in 1937, it was produced until 1955. It had a 569 cc four-cylinder, side-valve, water-cooled engine mounted in front of the front axle. The radiator was located behind the engine making possible a lowered aerodynamic nose profile. The shape of the car’s front allowed exceptional forward visibility.
The car was competitively priced, and nearly 520,000 were sold.
Click here to download a build a simple papercraft model of the Fiat 500 Topolino.