Answer:
What is as big as you are and yet does not weight anything?
What stays on the ground but never gets dirty?
A horrid monster hides from the day, with many legs and many eyes. With silver chains it catches prey. And eats it all before it dies. Yet in every cottage does it stay. And every castle beneath the sky.
With head without hair. With mouth without tooth.
Runs smoother than any rhyme, loves to fall but cannot climb!
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?