Answer:
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?
Package beneath a tree, inside a tasty treat. Keep it for a month, the taste is just as sweet. What am I?
I am a protector. I sit on a bridge. One person can see right through me, while others wonder what I hide. What am I?
I am a box which holds keys but not locks. With the right combination, I may unlock your soul. What am I?
In many hall ways you would stand if not with me in hand.
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.