UNO Game
UNO card game is a interesting game and everyone who is playing should be active in the game. You can't play it casually. You need to be active, accurate and watch closely. The most important thing is you need to guess what other colors your co-player is having in their hands. If you have more players then the game will be more interesting. Though it is a game, I feel it keeps you active and accurate. Usually we play this game for 2 hours. But yesterday we played for 3 hours and it went very fast. More info on UNO game.