I gave a presentation on 3D printing basics last weekend.
Stressed you need patience, lots of it. You can try Repetier to see the basics of 3D printing without having a printer. When you have your own printer, you can try things like burning the back of your hand on the extruder.
That’s something we don’t have 
I suggest keeping the kids out of the room while starting a print. They may learn some special words.
I know loads about all kinds of printing (just not 3d so far) and believe me, it’s no joke.
Ever try to do good counterfeit bank notes ? Bloody top notch, Sisyphos stuff.
So, what would you invest in a decent 3d printer able to create TOUGH, long-lasting objects of about 20 cms length ? I would risk some patience for that.
Good point. Pushing on fragile bits driven by locked steppers is a bad idea.
@Robert_Roberto It’s called hands on learning the hard way.
@Alan_McNeil , thanks for the slides. Didn’t know GDrive had presentation slides ability. I may take a bit from yours. I disagree on some points though, like ABS needing a fume hood, etc.
@ThantiK I only use PLA at moment. Fellow maker warned of headaches with abs. Could be using acetone and hairspray is real problem.
I will return to this thread in 25 years and chuckle over all the problems we used to have? “-Do you remember waking up the next morning just to find a pile of plastic spaghetti? Hahaha”