 Children under 4'9 need to be in a booster seat because they aren't ready for adult safety belts alone. Many parents miss the important step of booster seats. Maybe you better explain things to him. Booster seats raise your child up so that a safety belt designed for adults will fit and protect them properly. Oh, that does make a difference. Remember that 4'9 is the magic number. And get your little pumpkin there safely in a booster seat. Hop in, my dear. Oh, thank you. And like Cinderella, you can live happily ever after.