Well it depends on what you mean by change.
You can unscrew a lightbulb.
Nun.
None They don't make Pampers small enough.
One, and ten people to stand around clapping and saying "Aww, how brave."
Depends on the size of the pieces.
About 2 bucks an hour depending on what the current minimum wage is.
Me: What do you mean 4: Is her house made of bricks or sticks
Occam's razor
Me: Philosophers still don't know 5: No, why are we HERE Wife: Your dad is lost and won't ask for directions