We already have a DS Lite for my eldest son, he has the following games: Micro Machines 4 FIFA 07 New Super Mario Lego Star Wars Complete Saga Lego Indiana Jones Dr Kawashima's Brain Training Chessmaster We're about to get a second DS Lite for my younger son. I know some of the games we already have allow multi-player games with a single cart. Can anyone tell me whether any of these games have multiplayer options when you have a game cart in each DS? If you only need a single cart, I'll buy different games for boy 2, but if you can get good multiplayer experiences it might be worth buying a second cart for some of the games we already have. Advice and insights gratefully received.