This is a challenge for lost father:
-CAS it has to be a female(adult)
-your sim can have any aspiration and turn on(easier if family asp.)
-you can pick any house you want
-you can use the following cheats: forcetwins,moveobjects,kaching or familyfunds and 2 motherlode.
-find your father but DON'T marry the sim or let him move in you can ask to stay the night.
-build up relashionship and "try for a baby" try until your sim gets pregnant.
-have an affair or just argue with him.
-you're sim can have more fathers for children
-the more kids u have the more points you get:
1baby:5points
1toddler:10points
1child:15points
1teen:20points
-when a teen becomes an adult move them out of the lot.
-a teen can go to university

GAME OVER:
-you CANNOT marry male sim(father)!
-your sim dies!
-you CANNOT leave a teen that turns in to adult in your household!
-the children get taken by social workers!

IT'S A REALLY STUPID CHALLENGE I WAS SO BORED SRRY BUT HOPE YOU DO IT
i will post the 100 baby challenge

So is this like a single parent challenge?

no it's a challenge for one parent

yeah pretty much but it's really fun

well you can move your teen to university read i fixed it