Answer:
What comes once in a year twice in a week but never in a day?
Bright as diamonds, loud as thunder, never still, a thing of wonder. What am I?
What can fill a room but takes up no space?
I am a ship that can be made to ride the greatest waves. I am not built by objects but built by minds.
I am an instrument that you can hear but cannot see or touch. What am I?
The answer I give is yes, but what I mean is no. What was the question?