By the way, Kirby star allies and Kirby Fighters 2 both have free demos on the switch, as does Yoshi's Crafted world.
I actually find my kids have a lot of trouble with NES / SNES games, despite fewer buttons (as did I when I was their age, those games are tough!). Modern 1st party nintendo games have a lot of accessibility options, handholding, and less punishing death penalties. My 5 year old (just turned 6) was able to handle Mario Odyssey (assist mode on) and even New Super Mario Bros. U Deluxe (use Nabbit) just fine.
I actually find my kids have a lot of trouble with NES / SNES games, despite fewer buttons (as did I when I was their age, those games are tough!). Modern 1st party nintendo games have a lot of accessibility options, handholding, and less punishing death penalties. My 5 year old (just turned 6) was able to handle Mario Odyssey (assist mode on) and even New Super Mario Bros. U Deluxe (use Nabbit) just fine.