Answer:
I twist and turn and leave a loop. What am I?
I have a hundred legs but cannot stand a long neck but no head and I eat the maid's life. What am I?
When I point up, it's bright. When I point down, it's dark. What am I?
I break down buildings, I crumble mountains but you can't see me. What am I?
I go inside boots and outside shoes.
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.