Answer:
I am an object which is used in baseball during the day I can't be seen at all
What has many keys but can't open a single lock?
I shoot but never kills
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?
I have a neck and no head, two arms but no hands. I'm with you to school, I'm with you to work. What am I?
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.