Futoshiki RULES.
1. Complete the grid such that every row and column contains the numbers 1 to 4.
2. The arrows on the grid are less-than and greater-than signs.
Example: 1 < 4, 2 < 3, 2 < 4.
Its a fun Sudoku like alternative. Personally, I love these Japanese Puzzle Games. They are simple, and a good way to pass a few minutes.
Basically, this is Sudoku with the added challenge of following the less than and greater than symbols. But the grid is not as large, so it isnt quite as hard.