I believe you're a good father since you're concerned. As time goes you'll teach them focus and they'll teach themselves. Focus is a general problem and it has to be solved as such. More and more distractions will be born as years go by so you need a general solution. That's my suggestion.
~I have all of that, except instead of Kodi, Jellyfin. Also no nzbget because I just found out about that and AFAIK you need some kind of invite to enter a Usenet? I dunno! I get by with torrents :)~