Modular: How to Introduce Kids to Tabletop Role-Playing #1: Picking a System and Genre

It’s Christmas. You’ve got everybody together. Perhaps you’ve all watched Stranger Things and now you have the urge to dust down your dice, dig out the Dungeon Masters’ Guide and introduce whatever kids just happen to be lying around to the imaginative world of your youth.
Or perhaps in a fit of nostalgia, you made a Christmas present to yourself of a recently published role-playing game, but the only available players right now are under 12. Or perhaps you’re like me, a life long player, and this is just a good moment to share the joy.
So how do you go about introducing kids to tabletop role-playing?
Really very easily, as it happens. The youngest child I’ve GM’d for was my 5-year-old-daughter when she crashed a party of 9-year olds, found all the traps and made off with the loot. Having done this a few times and talked to other gamer-parents, I’ve noticed a few things…
(Geek and Sundry beat me to the punch on this one (link), but my take is slightly different.)