Audi has seemingly done the impossible: Produce desirable cars that emit exactly zero pollution or carbon dioxide. One of them is even a replica of the classic Auto Union Silver Arrow Type C race car, painted up in the expected shade of silver.

Perhaps the only problem is that these cars aren't exactly street legal. In fact, the aforementioned Auto Union model is exactly one half the size of the original racer, meaning its cockpit may only be suitable for children, and it's powered by pedals. Guess that makes sense, since the cars are being shown off at the 61st International Toy Fair in Nuremberg, Germany.

Audi is the first automaker to feature its wares at the show. "It's an exciting project," said Caroline Gerberding, who is responsible for exhibitions and events at quattro GmbH. "For the first time, the main focus of an exhibit is not to present our cars, but instead is aimed at showing off our 'little' Audi world."

[Source: Audi]  [ Source: green.autoblog.com ]