A safety device has a lower portion and an upper portion. The lower portion defines a cavity for receiving a seat belt buckle assembly and has at least one rear wall portion extending between opposing sidewalls that partially define the cavity. The rear wall portion forms a slot area to permit a strap attached to the seat belt buckle assembly to extend from the cavity when the seat belt buckle assembly is positioned in the cavity. The rear wall portion is configured to prevent the seat belt buckle assembly from moving laterally out of the cavity. The upper portion is hingedly coupled to the lower portion such that the upper portion completely covers the cavity of the lower portion when the upper portion is rotated into engagement with the lower portion.