Well, since he's so young, get him the ds lite. DSI has alot of features he wont know how to use, so he wont use them. I think its age appropriate, if u get him good games. YOur going to have to help him out at first, untill he remembers what to press. they make games for younger kids too. REMEMBER, you can always upgrade to a DSI later, dont waste your money on it now. Im guessing by the time he is old enough to have a DSI, there will be better technology he will want.