Answer:
I'm as simple as a circle worthless as a leader; but when I follow a group their strength increases tenfold. By myself I'm practically nothing.
I have hands but do not hold, teeth but do not bite. Feet I have but they are cold, eyes I have but without sight. What am I?
I have a neck and no head, two arms but no hands. I'm with you to school, I'm with you to work. What am I?
I come off of a beautiful creature which soars in the sky. I come off of a peckish creature which has a tail as mighty as the sun! I am sometimes dirty and parents beg you not to pick me up.
I hide in a dark tunnel awaiting my time. I can only be released by pulling back. Once released I may do unstoppable damage.
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.