Lisa Jakub, who plays "Barbi" is the little girl in Christine's 'Dan Daydream'. She most notably known for playing Lydia Hilliard, the eldest daughter in Mrs. Doubtfire.
Mara Bernstein is played by Carol Ann Susi. Carol is most notably known for voicing Howard's mother in The Big Bang Theory.
There is a 24 hour clock on the wall of the Lamaze class. An odd clock to be there anyway, but if it is "local" time, it appears to be around 5am or just after. If it is "Zulu" time, the it would be around midnight/1am (depending upon daylight savings time) or just after. Either way, all are odd times to have a Lamaze class.