Full disclosure: Psi Bands could be old news but were new to me. As someone who has grown up with motion sickness of all kinds (be it trains, planes, boats, cars…) I was really excited to find a drug free alternative in the form of some acupressure wrist bands that weren’t totally heinous/actually fit- they just look like sleek black (dare I say, unnoticeable?) bracelets. And bonus, they’re waterproof and fully adjustable. They fit wrist sizes 5 1/4″ – 8 1/4″ in circumference, so should work well for bigger kids. Available practically everywhere, including Amazon.