اما اساسا، چنین کاری باید انجام شود که دقیقا نمی‌دانم هزینه انجامش چقدر است، اما هیچ دلیلی نیست چرا باید از صندلی معمولی گران‌تر باشد. 
But essentially, do something like this, which I don't know exactly how much it would cost to do, but there's no reason I could see why this should be much more expensive than a regular car seat. 