Answer:
I go around in circles, but always straight ahead. Never complain, no matter where I am led.
The sun bakes them, the hand breaks them, the foot treads on them, and the mouth tastes them.
I am black when I am clean and white when I am dirty?
I can sizzle like bacon, I am made with an egg. I have plenty of backbone, but lack a good leg. I peel layers like onions, but still remain whole. I can be long, like a flagpole, yet fit in a hole.
Plow and hoe, reap and sow, What soon does every farmer grow?
You use it between your head and your toes, the more it works the thinner it grows.