Answer:
It is weightless, you can see it. If you put it in a barrel it will make it lighter?
I turn around once. What is out will not get in. I turn around again. What is in will not get out.
If I have it, I don't share it. If I share it, I don't have it. What is it?
What can be heard and caught but never seen?
They belong to me; they belong to you; They can make you feel happy or make you feel blue; They never end until the day you do.
What is so fragile that saying its name breaks it?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?