Step 1: A little back-story first (you can skip this if you like)
the pic is Dillon, holding my son Josh like a baby. like i said, he's a BIG boy!
Step 2: What you'll need
dremel or drill
screws and screwdriver
2 bicycle horn squeakers
large washers that will fit on the squeakers posts.
hotglue and glue gun
whatever kind of materials you'll want to cover your arms in
10 bicycle spokes
2 rubber gloves
a cape of some sort
Step 3: Getting started
although one of these pics show a hand already attached, it also shows the fold and the zip tie holding it. you'll want to use several zip ties up the length of the fold for strength.
Step 4: Fingers
whichever method you used, once you've got the fingers stuffed, take a bike spoke (curved end first) and insert it into the finger. this will allow you to position the fingers somewhat when we're finished.