I am glad that we are having this discussion/recollection at this time.  My
wife and I just found out that we are going to be parents and were
discussing how increased technology over the past 30-40 years had added to
the cost of pregnancy/child birth/child safety in this country.

When we got to the subject of child seats in cars, I was stumped.  Can
anyone tell me approximately when these became mainstream/required by law?

TIA,

Scott Walker