Answer:
What word looks the same upside down and backwards?
Two bodies have I, though both joined in one. The more still I stand, the quicker I run.
What is weightless but it needs two person to hold it?
If a man carried my burden, he would break his back. I am not rich, but leave silver in my track.
When I get closer my tail grows longer, but when I go away my tail leads the way.
You use it between your head and your toes, the more it works the thinner it grows.