Other than the obvious, don't go anywhere! I have tried to really pay attention to her triggers. I think after dinner seems to be the worst, even if we wait one hour. It usually happens if we go over 20 or 30 minutes of riding.
We don't make a habit of going out in the car in the evening, but we do sometimes enjoy an evening ride in the country.
I really do not want to try motion sickness tablets unless there is a homeo- form. I'm not up for doping dd just to take a ride! BTW, we have tried full stomach, settled dinner stomach, empty stomach, munching on crackers, pretzels and sips of water. None of these seem to matter in the least. My dh's side of the family seem to have trouble with this as well. Just trying to find a child-friendly solution until she's at least old enough to let us know she is going to be sick.
....and my husband wonders why the car smells like it does! :duh

As bad as it sounds, and yeah I know your not supposed to give your kids suckers while you cant fully supervise them, but the preggo pops for preggies...hehe......work great. My friend uses them on both her boys. She gives them to her when they first get in the car ans start driving and she has had no problems, but on long trips she uses them and sea bands. HTH

I heard there was a study done that car sickness can be cause by looking out the side window while travelling. Somehow it does something funky with our eyes to watch the world go by that way. You might watch your 2yr old and see what she's looking at. If she looks straight ahead, she might do better. Just a thought>>>

What about ginger...anything..pop or candy....

The homeopathic rememdy Cocculus Indicus is good for travel sickness.

Hey, this is from a great book I love to use: Smart Medicine for a healthier child by authors: janet zand , LAc, OMD , Rachel Walton RN and BOB Roundtree, MD.
The book gives a description of the illness, conventional treatment, dietary guidelines , herbal, bach flowers remedies, homeopathy and accupressure points.
very cool.
Anyway, here's what it says.
Determine if your child travels best on an empty stomach or full. Act accordingly. Avoid fatty or greasy foods, before travel. These are most likely to trigger motion sickness.
Homeopathy:
Cocculus 12c or 6x will help a child who feels nauseaus and refuses to eat anything. The smell of food makes this child sick and she insists on cuddling under warm blankets.
If your child feels less nauseated after eating, when resting quietly with her eyes closed, and when she knows the trip will end soon, give her Petroleum 12c or 6x.
If your motion sick child is pale, in a cold sweat, feels faint, and is nauseous and vomiting, give her Tabacum 6x, 12x, or 5c.
Give what sounds closest description of your kid.
Prevention: Teach your child to hold her head still. A strategically placed pillow can help.
Teach her to pick a fixed point on the horizon to focus on. The rushing by of the landscape confuses the balancing mechanism in the body.
Open a car window. Air rushing by onto face can help.
Practice distraction, like asking her to tell you a story. Do not ask her to read a book.
Recommendations:
Carry a thermos of ginger tea.
Good luck., Michelle

I always got carsick as a kid. You're already doing the best thing: believing her! Though I suppose vomit is a pretty clear sign LOL.
My carsickness is greatly reduced by sitting in the front seat (I rarely get carsick as an adult but did until I started driving). There is a lot less motion there. Unfortunately, the cheapass car manufacturers spent as little money as possible on the required air bags and it is too dangerous to put a young child in the front seat (and if you don't have a working airbag there you'll probably get harrassed anyway).
At the very least, put her next to the window, as close to the front as possible (not in rear seats if your vehicle has 3+ rows). Fresh cool air can really help. You'll have to experiment to see if AC does the trick vs outside air. Looking out a window helps a lot. Don't let her read or play with toys that require vision. Even looking down for a couple seconds every now and then can really increase the nausea. You can try games like "I spy" or looking for certain landscape features (cows, yellow cars, mountains, etc). Looking sideways is just as good as looking forward but don't face her backwards.
Stopping everysooften and getting out of the car and walking for a minute helps tons.
I found that eating salty food before getting on a boat helped a lot with seasickness. Never tried it for cars but should be similar. Something with soy sauce.
I'd try ginger. Candied ginger is probably the easiest way. Forget ginger ale, it isn't strong enough. Ginger beer is fine. You can make your own stevia-sweetened ginger iced tea if you want to avoid the sugar.

Hey, OP??? Did you try any of these? Did anything help?

Michelle's suggestions sound awesome and I would also add (because it helps me) trying protein snacks before and during car ride. Like a cheese stick or turkey jerkey or cubes of tofu or something like that.

Thanks for all the great ideas! We have experimented a bit this week with different times. Eating or drinking while traveling is out of the question, only exacerbates the problem. Ginger tea seems a good choice tho. I think looking out the side window is making things worse. Last night, my husband unbuckled himself and turned around to talk to dd. Keeping her looking at him and talking to him really helped to get us home with no vomit in the car! Thanks again! :D