Oi, Liz how did you find out about our triplet?? I never have used the 'baby on board' style stickers but that is because I could think of better things to do with my money! I have no objection to them at all as if nothing else it lets me know that the car in front may take manoeuvres a bit more slowly and carefully. As to whether it makes a difference if its one two or however many kids then the answer is yes! Well behaved children are still children with all the demands (I need a wee, I've dropped my toy etc.) of any child and no matter how good a driver you may be this can be a distraction. Extra children mean extra possible distractions!