A used child care bus brings a vehicle built to school-bus safety standards within reach of a smaller budget. The buses here are multifunction school activity buses and child care buses: built to the federal school-bus crash standards, without the stop arm and flashing lights of a route school bus.
A bus built for 14 passengers plus the driver or fewer can be driven without a CDL under federal rules; larger ones need a CDL driver. Child care transport has state rules of its own, so check yours on the state regulations map before you buy, and ask a rep about the child seats on any bus you're considering.