Dd2 gets car sick - is generally ok as long as she doesn't read/ look at a screen. Considering upcoming annual road trip, which verbal games do you play in the car? Dc are 8, 6& nearly 4. Youngest can manage easy letter games and often sleeps anyway.
To kick it off - I went to an island and took a... This game supposedly can only be played once as the trick is that it has to be something beginning with the same letter as your first name, so Sam can take a speedboat but Henry can't, but he can take a helicopter - keep going until everyone guesses pattern or gives up. Ours extended it by making up new rules - same letter as colour of clothes, which village going through etc.
Also another favourite is pink toads - where the answer to every question is 'pink toads', so what does your new teacher like to eat? What is your favourite food? Etc Take it in turn to ask a question, if you laugh or say something other than 'pink toads' you are out.
We also do spotting games so one person has to spot churches, another one bridges, someone else pylons (generally in France so lots of pylons) etc first person to 20 wins.
Some more ideas please?