I have learned to play poker since I was 10 years old, I think it would be good to learn poker as a child and if it goes well, then from the age of 18 you can start making money
I think it's important to start them off playing micro stakes SnG's and get them to build up to where they are easily able to 10-table them.
(get them 1 large monitor to start off with... a 38inch Wide monitor, should do the trick).
Treat it just as you would treat school homework. They must play for at least 2 hours., 4 days/week... and study for 3hours on Saturday before they are allowed to go out & play (no cartoons! Just poker!).
Once they are 12years old they should be expected to play longer hours, more study and also expand to playing cash games for 3 mos. to get a solid foundation for deeper stacked post-flop play that they'll need as they begin to tackle MTT's. Obviously they should move to MTT's next... this is where the easy money is!!! Of course hours played will become much longer. NO extra curricular activities for this child now... they MUST PLAY POKER!!!
soccer (football) games - NO
video games on TV - NO
watching movies - NO
listening to music - NO (not unless it's music in the background of a Twitch poker streamer)
Increase playing hours to 2 nights of 6hours each. And then both Saturday & Sunday, 8 to 10 hours each day!
Of course they will be staked and they will be giving you 60% of their profits! The other 40% you will hang on to for them,... investing it as you choose.