I've invited the parents of one of DS's nursery pals over for a meal (along with their kids 3 and 9). Trouble is, I don't know them that well, and with the children playing etc I don't want it to be formal. Also, don't want them to feel uncomfortable by making anything elaborate. So, what to do? My feeling was along the "jacket potato and sausage" line, but that just seems SO dull. Any better suggestions please you lot?