Annie...love the jelly baby idea.LOLOLOLOL
don't know if you will be playing games at the party..we used to have this at parties as children:
Meet Admiral Nelson
You dress someone up in a Nelson hat (you can make one out of card) Blindfold the person playing. Touch their hand to the hat...Here is Nelson's Hat. Touch an coat hanger hook and say "here is Nelsons's Hand". Say here is Nelson's eye and poke their finger in a half orange (this is even better if you warm the orange slightly in the microwave). Squeals ensued.
Not sure if it will work with adults....but it would be a giggle for those watching. Blimey Sophie, just realised you are organising your party two months ahead. That is really organised!!!