My son decided he wanted to learn to play guitar a month or two ago and he’s really taken to it. He’s played piano for a few years and also enjoys composing using an app he has, so he’s new to guitar but not to music.
He has a classical guitar that he has been playing but now it needs a string change so I “loaned” him one my electrics. He decided to try to learn to play the intro to Sweet Child of Mine, and after a bit of time can make a decent run at it, if not at regular speed.
What was really fun for me was when he was showing me how he plays it and I pointed out the shape the notes were making on the fretboard. I asked him if it reminded him of anything else he plays. It took a second but he realized it was a D chord. I left him to it and then a little while later I heard him trying to play it in different places on the fretboard—he’d put together that it was a movable shape, and it didn’t require long explanations or CAGED videos or anything like that. I wish I still had that kind of neuroplasticity!
It’s really fun to watch him take to the instrument. I told him that if he keeps at it he’ll probably be better than me in a few months and he doens’t believe me. I think I’m right, though. 
