Hi, I really feel for you and your son. Unfortunately I understand all to well. My son developed travel sickness at around one and a half and is now six and still suffering, he carries a sick bag around with him for all journey's. like you we tried the bands as he was until in the last year too young for medication. We now use over the counter travel sickness tablets which do not stop the sickness but seem to lessen it slightly. Have just looked on the netdoctor site and it suggests this, may well be worth looking into 'For long journeys, an antihistamine preparation such as Phenergan or Piriton can be helpful, although it does have a sedating effect and will encourage them to sleep'