Answer:
What goes further the slower it goes?
What kind of nut is empty at the center and has no shell.
What has 4 legs in the morning, 2 legs in the evening and 3 legs in the night?
They're up near the sky, on something very tall. Sometimes they die, only then do they fall.
I never was, am always to be. No one ever saw me, nor ever will. And yet I am the confidence of all, To live and breath on this terrestrial ball.
I repeat only the last word you say. The more I repeat, the softer I got. I cannot be seen but can be heard. What am I?