Answer:
Cows do this to salt and humans do it to ice cream.
A white field, and when it is plowed, its soil is black.
Taking this from a baby is said to be quite easy.
A locked sphere without hinges or key. Break me open and golden treasures you'll see
They made me a mouth, but didn't give me breath. Water gives me life, but the sun brings me death.
It is something you make after you've weighed your options.