Yes, one shot per bullseye. As for the two younguns.. Technically they cannot, the rules clearly state: "Only registered forum members may participate." While Id love to make an exception I'm afraid of the can of worms that might create. However, assuming they don't want to become a registered member (or cant, I don't know if we have an age limit) you are welcome to print a target for them each and once I post the scores they can see where they fall anyway. (but don't send me their targets, keep them handy and compare the scores to what is posted) My first suggestion is to get them to register, if they can!