You ask for answers

You ask confused "What exactly does being your baby for the weekend mean?

"Oh, I just assumed that Mrs. Collins told you all details. Well you see the purpose of this project is to see if we can take care of a baby for a prolonged period of time. Since of course Mrs Collins couldn't get her hand on real babies, she uses volunteers that have to act as replacement babies. You know wearing and using diapers and so on. I hope you don't back out now." Sarah explains.