Hadn't found one on here yet, so did one up quick. Student Driver magnet bumper "sticker". I use 4-10x2mm magnets snapped and glued into the back, then covered with a 1x1" piece of gaffer tape to avoid scratches to the surface. This is as close as I could get to the school bus font, set a pause at height in Cura post processing to change the filament color about 3 layers down from the top.