First Lego wheels

Fifty years ago this month, Lego began adding tires to some of its sets, and toys have never been the same. Now, the company says, it is the world's largest manufacturer of tires, though you probably wouldn't want to drive a car that uses its wheels. Still, with an annual output of 381 million wheels (the number it produced in 2011), you could roll nearly 100 million toy cars around the living rooms of the world.

These are the first wheels Lego ever produced, in 1962.