Questions about ballasts

I'm using an instructable as reference for a project and it says to use anything available that draws 5-10A as a ballast. Examples were a hair dryer, I thin toaster, and also an incandescent bulb as a test article.

I don't quite understand include any of those things in the circuit. Is it as simple as ripping the guts or if a hair dryer to get to the heating element and writing it in with the exposed leads?

Any general information on ballasts that aren't for florescent lighting would be very helpful