nintendo ds is jsut like gameboy advance...

da only difference between da two is:

DS has a laptop-like shape

DS measures 4 x 6

DS is like a pocket size computer

DS has live CHAT

DS has organizer

DS has two screen(touch screen and play screen)

you can insert two kinds of tape in DS(da tape in gameboy advance and da chip in DS)

Ds has a chip(just like a memory card in our phone) where in it is your tape for what game you like to play.

DS can be connected to other DS

Ds has on or off monitor light(no need to attach)

and lastly, DS is new than gameboy advance...hehehehe