I know I have a tendency to become easily obsessed with things, but I always stick with it. I am not a woman of fads. Which means...I have lots of obsessions. Currently, I am obsessed with SUDOKU.
The rules of Sudoku are simple. 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.
I like this website because it lets you use easy, medium, hard, and evil to choose the type of SUDOKU game you would like to play. They also time you. For my first SUDOKU game, I was able to finish in 10 minutes and 13 seconds. My last game, I was able to finish in six minutes, 35 seconds. So, you get better, but to start, I wouldn't worry about the time. That is just an added bonus when you finish. This type of thing reminds me of the puzzles that I used to give my students for some fun brainteaser activity. Some students would love it and some would dread it. I think my readers will feel the same. But, you should at least try it. You might be surprised.