Well it depends on what you mean by change.
Two. One to change it and one to yell "Ta-daa!" when he's done.
One.
None**. They operate in the **dark**.
Who's asking
Depends.
Depends
six more weeks of bad hockey!
Sorry teacher I overslept. You mean you need to sleep at home too !
It depends on the definition of lightbulb.
Because they philos all the time!
