Bus operators will often find it economical to convert retired buses to use as permanent training buses for driver training, rather than taking a regular service bus out of use. Some large operators also converted retired buses into tow bus vehicles, to act as tow trucks.
Explain to an 8 year old child that is not yet 49 tall that the safety equipment built into the vehicle is for adults  not children, and a child needs to continue to use the proper equipment (booster seat) so that the adult equipment will fit, and be able to protect, their bodies in the event of a crash.
A child four, but less than eight, must be in an approved booster seat, except when they are over 80 pounds and taller than 4â9â. Then they can be in a seat belt. Every child who is between eight and 16 years of age must be in a seat belt regardless of where they are sitting in the vehicle.