Jammies!
or
Three:
One to write the light bulb removal program,
one to write the light bulb insertion program, and
one to act as a light bulb administrator to make sure nobody else tries to change the light bulb at the same time.
or
They keep dropping their trunks.
or
At the Whale-weigh station.
or
Five. One to change the bulb and eleven to say they could do it faster.
or
The batter.
or