Answer:
I work when I play and play when I work.
Feed me and I live, give me drink and I die.
A hill full, a hole full, yet you cannot catch a bowl full.
I always follow my brother but you cannot see me, only him. You cannot hear him but you can hear me. What are we?
The more you take, the more you leave behind.
They are many and one, they wave and they drum, Used to cover a state, they go with you everywhere.