Answer:
I drift forever with the current and flows to your everyday life. I make living easy but I am good at killing people too.
They are many and one, they wave and they drum, used to cover a stare, they go with you everywhere.
I am carried by mad animals.
You can see me in water, but I never get wet. What am I?
I stand in one place yet I fill a whole room. I can be filled with molten rock and come in every hue.
I am a mini solar powered computer.