A bit late.. and not much about how to learn to code..but more of a figuring out if the kid has a right mind set to do so..

If the kid is not the type to question everything, not resourceful, not a logical/critical thinker, gives up easily and especially if not interested in how things work then being a dev is most probably not for them.. they can still persue coding, but it will end badly..

From my experience, people who have a better education than me, but lack those skills turned out to be a crappy dev.. not interested in the best tool to complete the tasks, just making 'something', adding more shit to the already shitty stack.. and being happy with that.. which of course is not the best way to do things around here..or in life!!

Soo.. if the kid shows all that and most importantly shows interest in learning to code.. throw him the java ultimate edition book and see what happens.. joke!

There are plenty of apps thath can get you started (tried mimo, but being devs yourself it's probably not so hard to check some out and weed out the bad ones) that explain simple logic and syntax.. there is w3schools that explains basics quite well and lets you tinker online with js and python..
so maybe show them these and see what happens.. If it will pick their interest, they will soon start to ask the right questions.. and you can go from there..

If the kids are not the 'evil spawns' of already dev parents or don't have crazy dev aunties and uncles, then they will have to work things out themselves or ask friends... or seek help online (the resourceful part comes here).. so google or any flavour of search engines is their friend..

Just hope they don't venture to stack overflow too soon or they will want to kill themselves /* a little joke, but also a bit true.. */

Anyhow, if the kid is exhibiting 'dev traits' it is not even a question how to introduce it to the coding.. they will find a way.. if not, do not force them to learn coding "because it's in and makes you a lot of moneyz"..
As with other things in life, do not force kids to do anything that you think will be best for them.. Point them in direction, show them how it might be fun and usefull, a little nudge in the right direction.. but do not force.. ever!!!

And also another thing to consider.. most of the documentation and code is written in english.. If they are not proficient, they will have a hard time learning, checking docs, finding answers.. so make sure they learn english first!!
Not just for coding, knowing english will help them in life in general. So maaaaybe force them to learn this a bit..

One day my husband came to me and asked me how he can learn.. and if it's too late for him to learn coding.. that he found some app and if I can take a look and tell him what I think, if it is an ok app to learn..
I was both flattered and stumped at the same time..
Explained to him that in my view, he is a bit old to start now, at least to be competitive on the market and to do this for a living, but if it interests him for som personal projects, why not.. you're never too old to start learning and finding a new hobby..

Anyhow, I've pointed out to him that he will have to better his english in order to be able to find the answers to questions and potential problems.. and that I'm happy to help where and when I can, but most of the job will be on him.

So yeah, showed him some tutorials, explained things a bit.. he soon lost interest after a week and was mindblown how I can do this every day..

And I think this is really how you should introduce coding to kids.. show them some easy tutorials, explain simple logic to them.. see how they react.. if they pick it up easily, show them something more advanced.. if they lose interest, let them be.

To sum up:
- check first if they really want to learn this or this is something they're forced to do (if latter everything you say is a waste of everybodys time)
- english is important
- asking questions (& questioning the code) is mandatory so don't be afraid to ask for help
- admitting not knowing something is the first step to learning
- learn to 'google' & weed out the crap
- documentation is your friend
- comments & docs sometimes lie, so use the force (go check the source)
- once you learn the basics its just a matter of language flavour..adjust some logic here, some sintax there..
- if you're stuck with a problem, try to see it from a different angle
- debugging is part of coder life, learn to 'love' it