I'm also prone to bad motion sickness. I found the best thing for me is Long Lasting Gravol (12rs lasting). I take it before I go to the parks, and it keeps me nausea free the entire day in the parks. Depending on where you are, I know that Ginger Kids (I think that's the name of the product) has crystalized ginger in a small box. I found this at London Drugs. You can also find Ginger Tea crystals that you can put into hot water as well. With the ginger crystals don't use the full amt as it's quite powerful. The ginger tea crystals I've found locally come in packs of 10, but you use one packet 3 to 4 times. Hope this helps.