I've just discovered Sudoku, a Japanese logic game. As with all good logic games, the rules for Sudoku deceptively simple. There is a grid of nine boxes by nine boxes, made up of nine three by three "subgrids." So picture one 3 by 3 grid; now picture nine of them, in a square box. The rules: enter digits from 1 to 9 into the blank spaces. Every row must contain one of each digit. So must every column, as must every 3x3 square. No repeats.
You can play online; print games off the Internet; or buy Sudoku books so that you're not computer bound. And daily Sudoku puzzles appear in some newspapers (not mine.)
More on this puzzle fad. I'm not surprised to see all the buzz about this (just check out the stories at google news). Just remember, as you're playing on line, and happy that on the Internet the software checks out what you're doing, is keeping your time, and just makes playing more fun -- those are some of the same reasons that teens enjoy playing online games.