https://techcrunch.com/2020/09/03/nintendo-is-remaking-the-first-portable-gaming-system-it-ever-built/

Quick, what was the first portable gaming system Nintendo made?

If you said “Game Boy”… solid guess, but not quite. For nearly a decade before Nintendo released that iconic gray beast, it was making the Game & Watch — a collection of handheld devices, each dedicated to playing just one or two simple games and, occasionally, doubling as a clock.