Answer:
I am of several different kinds, but the one you pick doesn't do its job. What am I?
I'm the source of all emotion but I'm caged in a white prison.
What is always coming but never arrives?
Send poorly behaved children to me and let them sit here.
Every night I'm told what to do, and each morning I do what I'm told. But I still don't escape your scold. What am I?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.