On January 4, 1968, the first Hot Wheels car rolled off a Mattel production line. It was a 1/64-scale, dark blue 1968 Camaro RS with black roof and redline tires. 15 other models would soon join the Camaro, and the lineup became known as known as the “Original Sweet 16.” The rest, as they say, is history. These tiny cars with wide wheels and low-friction axles flying around on orange tracks soon became omnipresent in the bedrooms and dens of kids around the world. Since 1968, well over four billion Hot Wheels have been built, far exceeding the production of...