But a few seconds of woohoo! Can be great fun, just like tickling. I have learned to tickle the children in my life in a limited-quantity way, and they love it, even provoking situations specifically so they get tickled. With proper warning and some continued diligence, you will have the very same kids wanting you to do such things. Kids like to do the "all squash the kids on the outside of the turn" g-force exaggeration game when going around corners and in the back seat.
"OH, U-TURN!" (Like Groo announcing his freeze ray in advance) and the kids will know what's coming.
"Time to hammer it!"
"Hard right coming up!"
"Time to test the seat belts!" (braking.)
I just know how to make just about anything fun. Maybe that's why kids like me so much. Now, adults, I'm not so sure...
Driving quiet and smooth most of the time will help the carsick kid (used to be one) but so will access to a window and a hard suspension reduces the sensory deprivation (I hated riding in Lincolns) and no vomit-attracting Air Freshener Scent. Not reading or face-hugging a phone while driving helps, also. "Let's play a game. How many Challengers can you see?"
"JOHNNY! Why is Dodge the greatest car company!" Keep him engaged.
"Is that a fighter jet up there?"
Let them dance through the sunroof at stop lights to loud music, standing on the console or front seats. Be the place where their fun memories are made.
The Fire Alarm Drill when everyone exits car, runs around it, then jumps back in the seats.
Singing various parts to familiar songs.
Carbonated and cold sugar-free drinks may help, but not sure. Front seat may help a carsick kid, too. It really helped me to see the scenery and be on the lookout for wildlife.
Make Johnny your designated cop lookout. I, for one, saved my dad from an accident and also spotted cops from around a mile away. Provide rewards. Hugs, too, OF COURSE.
Being treated like you are a genetically-inferior weakling held in contempt because you spoil the fun for everyone else does NOT work.
Give him a toy gun and teach him how to lead a target when moving past it, versus it moving past you.
There are so many options.
A busy mind and eyes prevent a sick stomach.
The "Hellcat Parade" going ridiculously slow through an intersection left turn signal or such when there is no one behind you are waiting for you to turn anywhere is a fun thing.
"Feast your eyes, Chevy owners!" In fact, at many intersections, having established that no change of speed on my part will make any difference, I crawl through below walking pace.
People have never seen anything like it, especially with a Hellcat. It's like seeing a horse walking backwards. The fastest American four-door waltzing through an intersection at snail speed just shocks people into waking up and noticing their environment. If someone on the other side is waiting to turn right, I don't do it so much. If they don't signal, then the egg is on THEIR face.
"Hey, kids look at the people's reactions to this."
Conversely, when driving in general, I try to make the guy behind me have an easy life, like signaling well in advance of a turn, keeping a smoothly-changing speed when following, instead of bumper-hugging, which makes me accelerate and brake a lot, which makes the guy behind me likely to have to do the same. I try to drag the guy behind me through a waning left-turn-lane green arrow, if possible, and I try not to scare people with my magnificent acceleration and brakes when coming right at them. I let people merge in front of me, get into traffic from a parking lot in front of me, etc. I try to make traffic easier for every car in my immediate area.
There are so many thoughtful little things we can do to make traffic better, like going the posted and stupidly low speeds by road construction workers, making sure they know we are going to stop or slow for them when waving their signs, and letting them know we are paying attention.
Going WAY around cyclists on the side of the road, not splashing people with puddles, even if it means slowing to a crawl or changing lanes or both, and just being courteous to others. I was walking on the left side of the road once and this big truck roared by me going the same way I was walking, on the same side of the two-way road I was on, barely missing me. He was passing the guy in the right lane. It was weird. Harmless, but weird.
It also helps your kids, in their social circles, to be known as the kids with the Dad with the Cool Car, and they are considered lucky by the other kids.