Please help with an advice or tips or products for helping a 2 1/2 year old with car sickness. She has had it about a year and it can happen on twisty roads or motorways . she sits in the middle (big brother and little sister either side). We don't use the car everday and she isn't sick all the times we are in the car so i see no pattern to her attacks.Any help would be greatly appreciated as she gets very upset when she pukes and i am sick of washing the car seat! mNY THANKS