My DD’s birthday party is coming up. We have sent invites approx 3 weeks in advance with an RSVP date by next Monday. We are yet to hear back from 7 other parents. Should I automatically assume if I don’t get a response from those parents they aren’t coming? I’m hoping to do a pass the parcel and have 21 children attending so far but worried that if the other 7 respond after that date or show up without indicating they were coming some children will be left out. I only have 1 out of the 7 parents contact details so might ask that parent a few days before if they intend to come, but undecided if I will do that or not as I shouldnt have to chase them. What would you do?