well actually there are many ways. you can starve them, they can die from a fire, but a very interesting way is to place your sim in a swimming pool then build a wall around the pool. for more ways you can go on YouTube.com and type in ways to kill your sim (etc.)
*for all these steps, make sure free will is off.
1) starving them to death 2) starting a fire, then click the fire and make them try to put it out themselves, as long as they don't have a smoke alarm, they will eventually die. But make sure they don't have a smoke alarm or this won't work.
3) put them in a pool, and remove all the ladders.
4) turn off free will and don't do anything.
No, Sims can not kill each other only the player (you) can kill Sims.
In the Nintendo ds version you cant kill your Sim.
Yes, you have to download the mod.
no!
never my own, but sometimes i create a new sim just to kill them :D
You can't kill any sims that are already made by the computer, (except the maid) but you can kill the people that you create in free mode.
no
In the sims 3 it is impossible to kill a baby.
Yo cant kill him.
You can't kill an infant.
You can't kill people.
Yes there was.