I'm a MythBusters fan. They did a whole special on motion sickness. Their conclusion is that the only thing that truly works is ginger root. It worked perfectly even for the red headed kid who gets puking sick just thinking about moving. A ginger root tablet and he could ride "the chair" for 15 minutes with no issues. Without it, 15 seconds and he's sharing his lunch with the camera. Ginger root capsules $3 at Walmart.