I have a work colleague and friend who's looking for some ideas for her son to play on his PS4. He's liked the Lego games, and Star Wars Battlefront, but is understandly concerned about the amount of violent/age inappropriate games on there. She mentioned how she doesn't strictly adhere to age ratings, as some games seem needlessly rated in the UK at least, but doesn't wanna buy something like Red Dead 2 for example.
So I come to you, the brain trust. Off the top of my head, I was thinking stuff like Journey, The Last Guardian and some more chill games like that. Please bear in mind he's only 7 though, so don't throw stuff like Fez/ The Witness at him