One more question for you guys, as I prepare to do shopping for my kids. My oldest son, who is 7, asked for a DS for Christmas. I don't know anything about them. I see there is a DS, DS Lite, DSi, 3DS. What's the difference between them? I tried doing some research, but the stuff I found were write ups done in 2008, so I assume they're out of date now. The Nintendo website is blocked at my office, so I can't look there.
We currently have a Wii, which he enjoys. We don't let him play more than a few times per week, and we'll do the same with the DS. But I don't know which system would be best for a 7 year old. I don't want to waste money on a fancy system that he's too young to get the benefit out of.
I saw the other thread here about game systems. But that seems to be focusing on the bigger game consoles. I'm looking for the small hand held one.

