Originally Posted by ejf customs
I need to make the bus safe to travel with a three month old.
For any passenger to be properly safe, you'll want a forward-facing seat with three-point restraint, and for an infant you want a seat that can attach a proper child car seat. The body of a school bus is built to remain intact in an accident (unlike a typical RV), but that's of little use to human bodies flying around loose inside.
I think it's also important to protect the area where your seats are from loose objects flying around - like the ubiquitous kitchen knives held up by magnets (or my personal favorite, the giant cast iron frying pan suspended directly behind the passenger's head). My bus has a steel bulkhead wall behind the driver's seat and passenger seats, which in addition to providing safety allows me to fully insulate the living space (since insulating the front of a bus is effectively impossible).