Answer:
You can have it, and be at it, But it never lasts forever.
What's always coming, but never arrives?
What time of day, when written in capital letters, is the same forwards, backwards, and upside down?
The day is their night and the night is their day, when I shout and they shout back I run away.
Come up and we go, Go down and we stay.
The strangest creature you'll ever find: Two eyes in front and many many more behind.