Kid-friendly co-op games on PC that are also fun for adults? (ideally vehicle-themed) Hi all! I'm coming to the end of a playthrough of Lego City Undercover with my four year old, and he absolutely *loved* it. For those who haven't played it, it's basically a child-friendly GTA-style vehicle and city sandbox with a ton of different missions.

Basically, I'm looking for something new for us to play, and it's not easy. Some key requirements -

(1) Split screen co-op

(2) Child-friendly (doesn't need to be super simple, but minimal violence)

(3) Features cars and vehicles (his passion)

Some non-essential but ideal things -

(4) Interest for adults (Lego City Undercover had great humour and some hard-to-find bonuses)

(5) Sandbox mode (because my son likes to go off and do his own thing sometimes)

(6) Not too reliant upon an existing franchise e.g., Batman, Lord of the Rings, or Star Wars (my son has no clue who these guys are)

I realise that's a bit specific, but any tips appreciated!