Is DS a patterns guy? Games on my iPhone that DS can play from time to time...

* Shift Lite (a platform/puzzle game that allows you to rotate the puzzle and invert the colors. A favorite)
* CrackCode ... ala "Mastermind"
* ChessFree (although actually I play that more than him!)
* Checkers
* Learn Chess (more of an ebook)
* Abacus1.2 (actually there are a few abacus games)
* Planets (that's what it's called) about all of the planets and space. Not a huge hit.

I don't think I've purchased a game yet, so these are all free games.

JB