Answer:
It is weightless, you can see it. If you put it in a barrel it will make it lighter?
At first, I am nothing. Add something to negate. Add again to oppose. Add again to find the time to draw. Add once more to find nobody at all.
What can you share and still have all for yourself?
What is lighter than what it is made of?
Talks like this, a green wise man does. Guess my clue, you will.
What did the piece of wood say when he saw the screwdriver and screws approaching?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?