Tiny Jet Engine

How can I make a jet engine that is realy tiny? I heard about this so called pen jet, can someone make an instructable, if there is one like that,? Or can you tell me how to make something tiny?

bumpus9 years ago
What rock have you been under, Killerjackalope (the guy who made the 'pocket rocket') made an instructable on it..
Kiteman bumpus9 years ago
While you typed that, I was finding [https://www.instructables.com/id/The-accidental-pocket-jet-engine.../ the link].

It's amazing what a simple search turns up.