Hand Held Word Games What Are Some Brain Testing PC Games For Adult/parents?

What are some Brain Testing PC games for adult/parents? - hand held word games

Looking for a gift for my friend's mother. We had the idea to host the Games. She loves Sudoku and word puzzles. His family has been playing the hand game of Sudoku. He also often plays online Map games.We thought about a DS and games like Brain Academy, etc., have, however, that poor students, it is outside of our own budget.

The question is therefore:
Does anyone know any games on the PC Brain Training?
She has a DS or Wii (no games consoles please).

Please and thank you. ^ _ ^