Sure, I added the following assumptions:

- stuff I play myself

- something I can explain to the 70yo parents in a few minutes before the game

- easily available (either recent, or a classic)

Here's five recommendations:

- Cacao (https://boardgamegeek.com/boardgame/171499/cacao)

- Carcassone (https://boardgamegeek.com/boardgame/822/carcassonne)

- Alhambra (https://boardgamegeek.com/boardgame/6249/alhambra)

- Ticket to Ride (https://boardgamegeek.com/boardgame/9209/ticket-ride)

- Samurai (https://boardgamegeek.com/boardgame/3/samurai)