my 7 year old has dsi and loves it. mostly for the nintendogs games. The dsi has a camera which is really cool and you can set it to wireless internet so i think you can chat with other kids that have a dsi, but for one that little you may as well save money and buy the regular ds. My daughter doesn't even use the camera or the extra functions and loves it for the games. I think DSI is about $170 and a DS is about $130