Answer:
What has three feet but no arms or legs?
What is made of wood but can't be sawed?
What type of bar gets you wet walking in and out of it but keeps you dry inside?
They're up near the sky, on something very tall. Sometimes they die, only then do they fall.
It is worldwide, but once only a spider could weave one
You use it between your head and your toes, the more it works the thinner it grows.