Answer:
If you look, you cannot see me. And if you see me, you cannot see anything else. I can make anything you want happen, but later everything goes back to normal. What am I?
What is shaped like a box, has no feet, and runs up and down?
I have two body parts but am used to measure length. What am I?
I am a busy worker who is a water mammal.
What gets bigger when more is taken away?
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.