Learning to Play Chess

Both kids have recently taken up chess. Jack seems especially interested. We are primarily using a game/book system called Once A Pawn a Time to teach him. There is also a good app for iPhone called Dinosaur Chess, both kids enjoy playing that. They have even tried playing against each other, although that has been more frustrating than fun, I think. So far they are sticking with the game even though it is difficult, I hope it teaches them patience (among other things).