While driving or whenever you have time on your hands, is a great moment for Acrobatics. The game is simple and as many as are present can play.
Grab any collection of letters - typically this would be from license plates but could also be from roadsigns, billboards, or other signage. Every player then makes up a sentence using those letters; a meaning for the acronym. e.g. you see the letters "OMG" on a license plate. One player might say "Oh My Goodness" while another player might come up with "Oscar makes granola." Once everybody has announced their definition, everybody votes. The person with the most votes wins the round and play continues.
The game is not really competitive; players are just trying to come up with the silliest phrases to crack each other up.