TV Trays
In the scene where Jane is a mother's helper, the family is seen eating dinner off trays while watching Bewitched. TV trays were quite a trend in the 1960's. Families went from eating in the dining room (think Leave It To Beaver) to huddling around their television sets. The family dynamic was changed dramatically.
This doesn't really have much to do with the movie overall, but it's another detail they got right, like the prevalence of smoking, a topic of another thread on this board.