I've really dodged a bullet with my boys not fucking up my game saves. I drilled it into both of them from an early age.
My 5yo loves the living shit out of Zelda BotW, and I was surprised how easily he was making progress. I'd thought I'd either have to hand hold him, or let him play on my save, but he's been romping his way through the game under his own steam. He only asks for help reading the test during cut scene or when he finds new items.
Rather then my boys play on my save, every now and again I go into their games and spend a while gathering yellow heart/stamina ingredients and making a bunch of useful meals.
At least the Switch has easy to use and understand profiles with dedicated game saves. Unlike the 3DS, where you have to hope the game has multiple save slots. I've only had one disaster, where my nearly-at-the-end save for Luigis Mansion was accidentally deleted by my eldest.