Motion sickness is primarily a vestibular condition exacerbated by nerves. Motion sickness afflicts several of my children. One gets air sick and the other struggles with car travel. As a kid, I'd get seasick and car sick. Here's a first aid kit I've assembled for children who suffer from travel sickness on airplanes. These tips help with motion sickness on car or boat rides, too. Helping Kids Cope with Motion Sickness in Air Travel