Go (game)
Go is an abstract strategy board game for two players, in which the aim is to surround more territory than the opponent. The game was invented in China more than 2,500 years ago and is believed to be the oldest board game continuously played to the present day. 
A 2016 survey by the International Go Federation's 75 member nations found that there are over 46 million people worldwide who know how to play Go and over 20 million current players, the majority of whom live in East Asia.
Cat's cradle
Cat's cradle is one of the oldest games in recorded human history, and involves creating various string figures, either individually or by passing a loop of string back and forth between two or more players. The true origin of the name is debated, though the first known reference is in "The light of nature pursued" by Abraham Tucker in 1768. The type of string, the specific figures, their order, and the names of the figures vary. Independent versions of this game have been found in indigenous cultures throughout the world, including in Africa, Eastern Asia, the Pacific Islands, Australia, the Americas, and the Arctic.