Answer:
I am not a toy though many use me for pleasure. I have a butt but I cannot poo.
Tool of thief, toy of queen. Always used to be unseen. Sign of joy, sign of sorrow. Giving all likeness borrowed.
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.
Never ahead, ever behind, yet flying swiftly past, for a child, I last forever, for adults, I'm gone too fast.
I am carried by mad animals.
What is lighter than what it is made of?
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic