Some people feel very sick while travelling in an airplane, boat, train, or car. They may feel queasy or nauseous or may vomit, and they may have a headache. This condition is called motion sickness.
Children are more susceptible to motion sickness than adults. More than half of children experience motion sickness when travelling by car ("carsickness"). Motion sickness is most commonly experienced when travelling by ship, with estimations that up to 100% of travellers experience "seasickness."
Motion sickness is rare in those under 2 years of age, but is most common between ages 3 and 12. Women experience motion sickness more than men. It also occurs more often in women during menstrual cycles and pregnancy.