Answer:
It is weightless, you can see it. If you put it in a barrel it will make it lighter?
I build up castles. I tear down mountains. I make some men blind. I help others to see.
Two people are born at the same moment, but they don't have the same birthdays. How could this be?
As beautiful as the setting sun, as delicate as the morning dew. An angel's dusting from the stars. That can turn the Earth into a frosted moon.
Do what he says and you'll be fine, don't and you lose the game.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?