One of our kids gets the dreaded motion sickness when we are driving and not just because of his parents driving ability.
This last weekend, we had a 2+ hour bus ride each way for a hockey game. On the bus, all the kids had various electronic devices in action. A recipe for disaster except that one parent alerted us to feeding our child sour candies on the trip. They worked well or were a great placebo. Bottom line--the trip was successfully made--both ways.