You have to look long and hard to find a more difficult job than designing future Scion products. In its short life, Scion has raced to the forefront of Gen Y desirability. From zero to 173,000 units in just 4 years. Toyota Motor Sales claims the Scion brand to have a median buyer age of just 30 years old, which makes it the youngest brand in the United States. From the same group of people who bring us the Camry and Avalon, both standards for Boomer buyers, but neither evoking a youthful image.