I'm not sure how much candy you can use, or even if you can use popcorn, but for what it's worth...
My students have made these "Monster hands" every Halloween for as long as I can remember. I looked them up online and found the directions and pictures (below).
Basically you need
Popcorn
Clear or see-thru plastic 'food server' gloves Available from a kitchen supply store, Smart and Final (if you have them in your area) or maybe even from your cafeteria food servers.
Candy corn(s) for each 'nail'
Plastic Spider Ring
Orange or Black ribbon for tying them off.
(Wire twist ties work well, if you happen to have some, to easily close off the bags. Kids can open and then easily re-close glove after taking a few pieces of popcorn.)
Put one (or two) candy corn in each finger (for the finger nail)
Fill each finger with popcorn and then fill the rest of the hand with popcorn.
Tie off the bag (glove) with (either a twist tie and then add)ribbon.
Place the spider ring on one of the fingers.
Here's a Family Fun page with a picture and directions
http://jas.familyfun.go.com/arts-and...&craftid=10210