Seeing as I intended on entering this in the Pocket-Sized Contest, I chose to use an Altoids tin for the container.
The circuit I used is the exact same as the Operation game; only I substituted the motor with a buzzer.
Most of the components for this project were already around the house, but here're some items I used:
Image of patient
Nuts, screws, misc hardware
2 AAA batteries
Rotary tool or drill
Straight-edge razor blade
I consider this more of an art project than anything, so, if you try it, you should try to add your own concepts also.
Step 1: Container
B] Spray with dark colors
C] Repeat as needed
I went with an Altoids tin to ensure I had a final project that could be considered pocket-sized. This is one of the few items I had to purchase 'cause it's not a product I much enjoy. Curiously strong? You gotta have supercalifragilisticexpi-halitosis to need a mint that strong.
To get a battle-worn look I went at the tin with a palm sander. Getting the bright colors off the tin was more-or-less what I wanted. The overall look was inspired by Bioshock. The cosmetics basically came down to what interesting little parts and pieces I had.
Lastly I toned the tin down with some darker colored spray paints.