Answer:
I fill a room but take no space.
I am an instrument you can hear but cannot touch or see. What am I?
I go through a door but never go in, and never come out. What am I?
I am a mini solar powered computer.
I am flora, not fauna. I am foliage, not trees. I am shrubbery, not grass. What am I?
When is it bad luck to see a black cat?