None, they would rather keep you in the dark!
Two. One to screw in the lightbulb and another to sing about all the good times they had with the lightbulb.
None. Their parents will do it for them.
None. They aren't about to change a bulb when flipping a switch has worked for 15 years.
0, the light bulb has to want to change itself.
None. They glow in the dark.
