wear a baby.
babies can, like adults, suffer from their ears in the plane. sucking on something can help with that. so take a pacifier, bottle or candy for the road. toy goes into the plane, one toy at a time. let the baby than the rest of the toy is also not see. thus, the baby less easily bored and can entertain themselves. if you want to be social with other people on the plane, you can take an ear. when people suffer from your crying baby, you can give them this.
also in the car is that one toy at a time is good enough. a child may feel this 