It really depends on the age of the person (a five-year-old naturally likes different things than a sixteen-year-old does) and on their interests.
For young children:
For slightly older children:
pin the tail on the donkey, twister, yahtzee, monopoly,...
have a fashion for fun
Fun birthday games are active things, like scavenger hunts. You could also do bean bag tosses, croquet, or bocce.
Spin the bottle!(:
One that is fun is slap the keyboard
There are many websites which have fun games to pay for free. For instance, Facebook members may play games on Facebook. Other websites which have fun games to play are Pop Cap and Addicting Games.
heres some games i play or some that r fun Zwinky.com supersecret.com roblox.com freereamls.com wizard101.com
we play games just to have fun
How about Golf.
7up
I think A fun Outside One Player Game Is Pretend.
Some fun games to play in the United States for children are Uno, Scrabble, basketball, soccer and other sports. There are various types of games to choose from also.
All games will become addicting if you play them enough.