This is a great opinion to have, your children are lucky ones! Im not sure if they understand what is happening in the car seat but they do figure it out after a couple drives(At least mine seem to, but we canāt exactly ask them). I had these same aspirations to eliminate crying, but now with siblings the crying is inevitable. I think itās ok to let them cry early on in the car seat because A, I have no choice. And B, it sets them up for years of riding in the car. I wish I knew a thing or two about various sleep training methods but Iāve never had a reason to research them.