I have an old Raspberry Pi 1 (!) still going strong with Batocera Linux running NES, SNES and Mega Drive (Genesis) emulators.
I’m looking for easy multiplayer games that can be played with a 5yo. Non violent and ideally co-op, bonus points if somewhat educational.
I second Dr Mario. When I first went off to kindergarten, my mom and little brother would play Dr Mario together. It’s perfect for that age range, simple to play and control, with an option for two-player mode.