A seatbelt adaptor, a system, and a method for enabling a user to improve the buckling and unbuckling of a child in a child booster safety seat in a vehicle, for use in conjunction with a conventional seatbelt restraint system, the seatbelt adaptor comprising a central lengthening device, an adaptor latch plate, and an adaptor buckle and wherein the length of the seatbelt adaptor is suited to improve upon the latching of the buckle of the seatbelt that secures a child seated in the child booster safety seat within a vehicle.