Go to the ... in the right corner of the page, then to options, then game options then you can set how long sims live and make children live for hundreds of days
What do you mean by make them young?
your sims will stay in love, so you just have to keep up your relationship (without using romantic interactions) until the teenage sim ages to be a young adult.
Yes, young adults are permitted to date adult Sims as well as elder Sims.
3 days - like a normal sims 3 pregnancy
no, i don't think so...for the sims 2 there was this object you could download and make your sims young again but i don't think anything like that has been made for the sims 3.yet.
They stay pregnant for 3-4 sim days
nope. not in any version. but, young adults can (in the sims 3 or if you have sims 2 university)
No, young adult is not a genre of book in The Sims 3.
yes they can
No.
young adult
3 sims days