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 am a box which holds keys but not locks. With the right combination, I may unlock your soul. What am I?
I'm not really more than holes tied to more holes; I'm strong as good steel, though not as stiff as a pole.
I am what one cannot keep, two cannot hold, and three cannot destroy. What am I?
I help engines spin and pants stay up
I start with T end with T and within me is T.
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic