Answer:
What is that which, though black itself, enlightens the world without burning?
As I walked along the path I saw something with four fingers and one thumb, but it was not flesh, fish, bone or fowl.
How can you burn an apple, blueberry, rose and pumpkin without leaving any ashes but retaining the smell of it?
All about, but cannot be seen, Can be captured, cannot be held, No throat, but can be heard.
My voice is tender, my waist is slender and I'm often invited to play. Yet wherever I go, I must take my bow or else I have nothing to say.
People take me on walks and I run and have fun. What am I?