"Care for a child for a week" has been a high school or college task in various countries over the years.
It's nothing my schools ever did but I think from a quick google it is widespread with lots of local initiatives.
And these days the modern dolls are really quite complicated and need feeding and changing and scream etc.
Are there stories that play on the situations that could arise? Like the average MC who gets paired with the cheerleader who turns out to be hiding very strong desires to be a mum etc?