um, are you talking about My Sims Camera for the DSi only available in the Nintendo DSiWare shop? Because if you are i have it on my black DSi with its red/black Nerf case. Its easy to use and if you are having trouble with it they have a help button on the main screen.
no you can not have kids on my sims for ds.
Yes you can woohoo on sims for ds and dsi.
your sims can't get married in the sims 2 Castaway for the DS.
nope, not on the DS version.
how do you get to level 4 on my sims on the ds
No i have the game on my ds lite and i have finished it
It's got a simple 2 megapixel camera.
Yes in The Sims 3 DS, The Sims 3 3DS, and 3DS The Sims 3 Pets
Nope, And you cant have kids on the Ds Sims.
The Sims 3 for DS has been released.
You can get sims castaway on both PSP and the DS
no, you can't get married on the DS version