Ok, I know I'm going to get flamed here but I can't keep quiet. If a child was 2 inches too short to stop using a car seat, would putting on thick shoes make them safe in a regular seat belt? The whole point is safety. We've all seen small kids sitting with those over the head restraints and they don't look comfortable but we know that they're safe because the ride was designed for it. Each ride has been designed with a certain height ratio in mind for safety.