We use Dramamine Non-Drowsy Naturals. My 6 year-old can take it, but no one younger, which is okay since my younger children can't go on any rides that could get them motion sick. I love this type of Dramamine because it is non-drowsy and made out of ginger. I feel good about giving it to my children and it works for my husband and I as well.
Sea-Band Wristbands are great! The bands had a little bump that rests on a pressure point in your wrist that keeps you and your children from getting motion sick! This is great for guaranteed non-drowsy motion sickness relief and prevention. We love bringing our bands anytime we travel, on cars, boats, planes, and rollercoasters!
The sea bands work great! We also talked to our pediatrician and he prescribed something that was non-drowsy. My husband has used the patches that go behind the ears before but not sure if kids use those. My son gets car sick also not fun at all.