My DDs have just been invited to their first birthday party in the next few weeks. It is a child at their preschool 4th birthday in an hired out hall. Basically I have no idea what the latest party etiquette is! Am I expected to leave them there or do I stay with them and watch? To be honest I think they might burst into tears if I leave them with "unfamiliar" adults, but I don't want to be the only mum standing there. Can anybody help?