I've always wanted to do the 'bunch of grapes' so very Pop her in green/purple leggings & t-shirt & blow up lots of balloons smallish & tie around her... voila a bunch of grapes untill her fellow classmates pop her that is Grapes
I went dressed as popcorn to a circus theme fancy dress party once!
Wore a red and white stripy dress.. Then asked kfc for an unused small popcorn chicken box.. Which i covered in red and white stripy wrapping paper and filled with popcorn (i used lots of pva glue to make sure popcorn stayed!) then i threaded an Alice band through the bottom of box. Whole outfit cost about £10!
Also done a bag of sweets (dd wore a unitard which we sewed Velcro too and made "sweets" out of different shaped boxes, wrapped in pretty papers. Stuck Velcro on them and added to the unitard. Then we wrapped cellophane from the florist from the neck to the knees to make the bag. Voila a bag of sweets).
Berty basset. A wedding cake, all ones we've done.
Another one we've looked at Is a picnic. Cut a hole in the centre of a paper table cloth to put over child's head and stick paper plates, plastic food, paper cups to it.