When the electrically powered American Pony automobile debuted at the 1907 Chicago Auto Show, it was promoted as an evolution of hand- and foot-propelled cars for children. Manufactured by American Metal Wheel & Auto Co., it came standard with a rechargeable battery and leather seats, and could reach a top speed of 10 miles an hour. Just 47 inches long and weighing only 350 pounds, the American Pony cost $350, or about $8,300 in 2014 dollars. The price ensured that the car, along with similar compact competitors, represented a fad that gained little mileage with parents.