Answer:
It cannot be seen, it weighs nothing, but when put into a barrel, it makes it lighter.
When it is alive we sing, when it is dead we clap our hands. What is it?
What can be forever wound up but never annoyed?
Both punishment and sweet reward, It will befall both fool and lord. It is a spiritual scoreboard, Your every deed it does record.
A shimmering field that reaches far. Yet it has no tracks, And is crossed without paths.
What language does a billboard speak?