Pokemon Red/Blue was released in 1998 when I was 17 years old, and I first tried to interest Natalie in Pokemon X/Y when she was 5 or 6. She kind of enjoyed exploring, battling, and collecting pocket monsters, but most of all she wanted to go back to the beginning of the game, to her home. It's counter to the design of the game and there's no in-game reason for you to make this trip back: your mother barely acknowledges your presence. But obviously the desire to return had nothing to do with game mechanics and everything to do with how she felt.
Recently I bought a game called Stardew Valley and the kids are fascinated to watch me play it. As much as I've tried to interest them in other games in the past, this one has grabbed their attention so much that they actually ask me to play it, and watch intently while I do. It seems most of the reason for its appeal is that Stardew Valley is all about living a quiet life on a farm, raising livestock, making friends... not your typical action-packed video game nonsense.