Now I don't know much really about the DS (as I don't own one) but several of my friends kids have them.
A friend of mine (who I visited this evening) has a 5yr old who is just learning spellings and sums. They have the Brain Train game (or whatever it is called) but I was wondering if there are any other educational games out there they they could look at getting for the DS?
i've heard that the mind quiz games and others are very poor games. sudoku is supposed to have brain enhaning powers as, can i imagine do picross and advance wars which are good and excellent games respectedly.