Answer:
In we go, out we go. All around and in a row. Always, always steady flow. When we'll stop, you'll never known. In we go, out we go.
I have legs but walk not, a strong back but work not. Two good arms but reach not. A seat but sit and tarry not.
I can move even when you are still. I can be one or many.
Each of these ends in a kettle full of precious metal and the double variety is quite awesome
You use it between your head and your toes, the more it works the thinner it grows.
Why was the cook arrested?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?