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.
Many children need a booster seat until they are around 12 years of age. 1  The diagonal part of the safety belt must cross their shoulders not their neck. 2  The lap part of the safety belt must cross their pelvis, touching the thighs, not up around their tummy.