cool wikipedia pages.

Cognitive Biases A cool list of biases people can have.
Polyforms You know those shapes in Tetris? There's a whole bunch of those, called polyforms.
Tic Tac Toe variants Alternative versions of the classic game Tic Tac Toe.
Cellular automaton Giving rule sets to cells/pixels to create mass life, really cool. Conways Game of Life is one of these.
Paper and pencils games List of games you can play just using a paper and pencil. Most of these are 2+ players though.
Mariko Aoki phenomenon A japanese phenomenon, about having to go poo when you enter a bookstore. There's even conspiracy theories about this. Weird stuff man.