Answer:
You eat something you neither plant nor plow. It is the son of water, but if water touches it, it dies.
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.
A box without hinges, lock or key, yet golden treasure lies within.
What does a WW1 Trench, A Submarine and a Popular Phone App all have in common?
What do you fill with empty hands?
What did the piece of wood say when he saw the screwdriver and screws approaching?