 You must be your fairy godmother. It doesn't take a fairy godmother to tell you that the right fit means everything. Good heavens, child. You can't go in that. 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.