Answer:
I am the minerals vital for your good health.
I can't go left, I can't go right. I am forever stuck in a building over three stories high. What am I?
Only one color, but not one size, stuck at the bottom, yet easily flies. Present in sun, but not in rain, doing no harm, and feeling no pain. What am I?
Everyone has me and no one can lose me. What am I?
What is black and white and red all over?
If I say "everything I tell you is a lie", am I telling you the truth or a lie?