Thanks for the tear down. It's rather like opening up a beached whale, sad but very fascinating.
The mirrors are the most usefull part in a laser printer, as they're optical grade and surface silvered. Repurposing ideas include; use on an optical bench to study quantum mechanics, build a light spectrum analyser, make a newtonian telescope, or make a simple periscope from a cardboard tube. With enough mirrors and scan prisms, one might contruct a steam punk chandelier. But that requires a lot of dumpster finds! I'm sure one day your young apprentices will build those stepper motors into their killer robot school project.