Answer:
What an fill a room but takes up no space?
The eight of us move forth and back. To protect our king from the foes attack.
I have split the one into five. I am the circle that few will spy. I am the path that breaks and gives. I am the bow no man may bend.
The older they are the less wrinkles they have.
The weapon of choice to create the biggest shock.
People take me on walks and I run and have fun. What am I?