Yes you can, a typical camera SD card is exactly the same thing as the DSi uses.
It doesn't need a SD card, but you can put in a SD card if you want to store more pictures and music. If the SD card doesn't hold music, but camera, the SD card will not work on the music.
no camera sd card cards dont fit
All SD cards work on the DSi.
Yes, the DSi uses the same SD cards as cameras. However, you can't use the pictures you took with your camera on the DSi, because there is certain information it saves with the pictures that cameras don't. You can use pictures you've taken with the DSi on cameras and computers, though.
It now has an sd card, camera, and more microphones.
No, the only things you can insert in a DSi is headphones/ ear plugs, a game and an SD Card.
The SD card will work on the Wii but the information stored will not work (with the exception of pictures)
In what way are they broken? If none of them work, surely it means the DSi is at fault. Test the games on someone else's DSi. If they work, then you might need to send your DSi off for repairs. If none of them work, you can try sending those too, but if the whole lot have stopped working, it sounds like damage through neglect or an accident, none of which is really fixable by a non-specialist.
you don't need a card to take photos but is optional, without a SD card 300 photos can be taken, with a 1gb SD card i can take 3,000.
You can buy a specific SD card for the DSi at GameStop.
Well first you have to buy a sd card for it,(i bought mine at target). Next you have to put your sd card in your computer, or if your computer doesnt have a sd card slot buy a sd card reader at radioshack,(mine was 13$). Then find the file your sd card is in. Then find a pic you want to put on your sd card and drag the pic to the sd card file. Then put your sd card into your dsi