Hi
Here is how to have a child:
First, you have to buy the crib which cost either 3 LP or 3000 Simoleons
Then, you click on the crib to have a baby. ( the crib, which is very cool , takes about eight hour to load)
If you have done it right , it will say "Storke En Route" which mean storke on the way so the baby is coming!
When the baby grows up, it will be able to plant with the other sims to get more money
Hope this helped xxxxxxxxx<3