How many weeks before the party do you send out invites? Personally ATLEAST 3weeks, with the girls parties i tend to try for atleast a month as most of our family have to travel.
what timeframe should you give for RSVPing? where possible i like to give myself a week to get food, drinks etc in order so minimum 3 days before the party so normally invites say 3wks before (or longer), RSVP's due a week before.
if your child was invited to another child's party but was unable to attend, do you have to invite that child to your party? If they play togethheand get aloonthen YES i would invite them, if it is a matter of numbers and you can spare a spot.. go ahead, IF it's tight (ie too many people) and they don't really play together or a't really 'friends' then no harm in not inviting them.