Oh man, I remember playing "Bug" with my 2 brothers (we were born in 57, 59 & 62) on every trip our family made! God bless my parents and their patience with the incessant yelling of "Blue Bug", "Red Bug" etc. That was so fun!
It's now called "Punch Buggy". "Blue punch buggy (punch in the arm) can't punch back!
How they put up with the three of you in first place not counting the "bug" game is a miracle ;D! Your poor mother was dealing with toddlers and diapers for over 5 years.
We had a turquoise blue Corvair as our 2nd second car (first was a little Renault that looked like a miniature "Untouchables" car - or sort of like a mini-Cooper now) and on long trips, we watched for the newer Monzas which were burgundy colored.
The color was actually "cranberry" which was a "new color" and we'd yell "cran ... bear .. ee" in a high-pitched voice. Have no idea why.