Sudoku from http://www.dailysudoku.co.uk/sudoku/index.shtml
I am absolutely addicted to Sudokus. I do several a day. I went through a Dell book in no time flat, so my husband bought me a book with 500 puzzles in it for Valentine's Day. (How romantic-NOT) lol I'm still plugging away in that book but should have it finished in a week or two.
What is a Sudoku?
Wikipedia has a better explanation than I can give.
Here are a couple websites for the kid-version sudokus.
I started out my addiction by printing puzzles from the first site listed. They also have children versions there that I print for my son.
I do these all day long. When DS is working on something and needs me present, I'm working on a Sudoku. I do one when I wake up with my coffee. I do one before I go to bed. I really am addicted.
And I know contemplator is going to ask again...does doing sudokus make you more logical or just better at sudokus? Hehe, sometimes I think neither is my answer. I will admit here that the first sudoku I did took me a couple HOURS. D'oh. Of course I didn't read any tips on how to do them (yeah, that's my excuse) and I printed out a hard puzzle. Start with an easy one for pride's sake.
I have incorporated sudokus in school. Occasionally. I write them out on the big white board in my kitchen and have DS solve them. He does kids versions on his own because he just doesn't have the patience to do a big puzzle, even though he could. I do make him do the regular puzzles with me occasionally because I'm a mean mom.
Off to do another one before bed.