Outside of the cab family's home there it looks like there are diapers hanging on several lines, but they are actually pennant lines like those used at car dealerships.
The baby cab passes two billboards. One advertises Charm perfume. The next advertises Jones Bros. Cough Drops, with two older bearded men, a parody of the popular Smith Brothers cough drops. The advertiser of this billboard is Apex Sign Co. which can be seen at the apex of the sign.
The wallpaper around the top of the baby cab's room has auto motifs including tools and car parts.
Outside the Good Samaritan Automobile Hospital is parked an ambulance. The front end is an ambulance and the back end is a tow truck.
Junior is shown stripping off his dowdy, sensible, "family car" sedan body, for a small, lightweight "roadster" body- An open-top 2-seater, that was the cheapest bodystyle, for the pre-ww2 cars bought by teens in the 50s. Commonly mis-labelled a "convertable" today, "roadsters" DIDN'T convert; They were just permanently open-topped, with no windows, to save manufacturing cost. But because they were cheap, lightweight, simple, and plentiful, they were also the most desirable, iconic body for a hot-rod. Especially when painted in "Go-fast red", with a raccoon-tail on your radio antenna, and twin exhausts, as depicted in the cartoon, showing the stereotypical "hot rodder" of the era.