~~Tetris ~~
possibly the most popular casual computer game of all time .. celebrates its 25th anniversary TODAY!.  its  creator is, Alexey Pajitnov

Practically everyone has heard of it and anyone can play it, even those with little or no experience. The concept is so simple. perhaps it is the very simplicity of the game that makes it so addictive. in Tetris, you rotate falling geometric shapes on a rectangular playfield; completing horizontal rows of blocks makes them disappear and gives you points. It's a format that has been relentlessly duplicated and evolved over the years.
                                                            this game has given this daughter of mine many years of excitement and fun!

there is even a "board game" so those without a computer or gaming device can still play
no discrimination...