When this is not possible, or when the trip lasts longer that the nap, you could try placing your child’s car seat nearer the centre of the car, in front of the rear axle. This often helps to alleviate car sickness. Looking out of the window can help too, so playing games, or talking about what is happening outside are a good idea. So is getting a car seat that allows your child to see over the door panels.
Toys, singing along to CD’s or talking can help to take your child’s mind off the motion sickness, but be cautious with books, as they can make things worse. Another good idea is to let your child have a snack before the trip, and make sure he or she stays hydrated during the trip. It may sound counter productive, but having something in his or her stomach may help your child to avoid nausea.
If you really find that car sickness is a big problem, you can speak to your doctor. There are certain prescription medications that your child can take to reduce the likelihood of car sickness. Bear in mind that these often cause a dry mouth, and can lead to hyperactivity, or on the other end of the spectrum, drowsiness.