Answer:
What runs around the whole yard without moving?
I am a word. I become longer when the third letter is removed.
I am an English word with 3 consecutive double letters.
I move without wings between silken strings. I leave as you find my substance behind
Whoever makes it, tells it not. Whoever takes it, knows it not. Whoever knows it, wants it not. What am I?
Before I grow I'm small. When I'm old I grow tall. When I die I give a mighty fall.