Answer:
They are Dark, and always on the run. without the sun, would be none!
What instrument can make any sound and be heard but not touched or seen?
An artΒ-form and its colourful result.
I'm a starchy plant tuber that is one of the most important food crops, cooked and eaten fried, such as french fries.
Tickle with your fingers and a song it will sing. Be careful, though, you may break a string. What is it?
It is something you will never see again.