S.H.
WOw... what an assignment!
ALSO, your sister needs to think about WHO is going to be assigned to that table to "supervise" all those children? THIS is VERY important... and the Parents/other adults, will want to enjoy the party too. You can't just leave the kids at their table unsupervised... or, to have them wander off...
www.orientaltrading.com has some great craft/goody bag ideas for any age. Try that.
Oh also, depending on the age of the children, many times the young one's will still want to be with their parents, and/or have separation anxiety... so keep that in mind. Kids will want to go back and forth between their Parent's and the table... kids do NOT stay still! And some kids cry...
Good luck!
Susan