My DD is very car sick, she will vomit 9 times out of 10 on any journeys over around 25 minutes. We have tried medication, wristbands, not eating too close to travelling etc but nothing seems to help her. She is due to go on a school trip to mark her finishing primary school to somewhere which Is a 1.5 hour drive. I'm not sure what to do with her travelling there. Should I keep her home?