Step 1: Get yourself a pumpkin.
I hollowed mine out, thinking that I was still going to light it jack-o-lantern style, but in hindsight I should have left it whole.
Step 3: Gather / make your materials
I decided just to make a whole bunch of stuff, without really knowing what all I'd use.
Step 4: Paint your materials
Step 5: Get ready for assembly
Step 6: And now you have...
Step 7: All done.
The weird goggle things: egg carton with wires and stuff made from Sculpy.
Gears: I found those at a craft store in the jewelry section. I just shoved them into the pumpkin flesh like ninja stars.
Mouth: corrugated card board.
Screws: Some are real, some are Sculpy.
Monocle: a little glass locket, also from the craft store. the chain and almost everything else is made from Sculpy... again.
Hope to see some others riff on this idea and post their results!