Before Nintendo changed history and made the Famicom, they released a series of handheld games under the “Game & Watch” banner. They were simple LCD games that also told the time. The series began in 1980 with the game Ball and ended in 1991 with Mario the Juggler. There is a huge sub-culture of Game & Watch collectors within the video game community, and some of the rarer ones can sell for upwards of $500! If you ever see one at a yard or garage sale, snatch it up, it may be worth a ton.