This was from awhile back when Adrian was about 4.5 years old. I was giving him a shower and we talked about last time he threw up because he was reading in the car.
Me: If you read a book when the car is moving, you'll get nauseous easily. That's car sick.
Adrian: Why is it called car sick?
Me: Well, you get sick, not feeling well in the car. It was caused by riding in the car, that's why it's called car sick. Yet I don't know why they call it sea sick not boat sick when you are on a boat.
Adrian: When you are sick at home, do you call it home sick?