When I was in high school I took a class that had this same project as half of the grade. One of these babies was called the crack baby it was supposed to represent a baby born to a mother that had taken drugs while pregnant. Wouldn't you know it when the babies were handed out I got the crack baby which was way grouchier then the other babies.
To make a really long story short, I had to hire a babysitter while I worked and that babysitter(my mother) neglected the baby. I was so upset that when I turned the baby back in to the teacher I dropped the class so I still to this day have no clue what grade I got on the project.
I hope you grade turns out well, good luck.