Answer:
I have eighty-eight keys but cannot open a single door? What am I?
It comes only before, it comes only after. Rises only in darkness, but rises only in light. It is always the same, but is yet always different.
The part of the bird, that is not in the sky, Which can swim in the ocean and always stay dry. What is it?
What leaps one time out of four?
They are Dark, and always on the run. without the sun, would be none!
People take me on walks and I run and have fun. What am I?