Answer:
You use it between your head and your toes, the more it works the thinner it grows.
Ten men's strength, ten men's length. Ten men can't break it, yet a young boy walks off with it.
Always wax, yet always wane: I melt, succumbed to the flame. Lighting darkness, with fate unblest, I soon devolve to shapeless mess.
What is as big as you are and yet does not weight anything?
There is a puzzle which can be asked all day with a different correct answer each time. What is the puzzle?
What never gets any wetter no matter how hard it rains?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?