Thinking of what to do for tomorrow. I know what I was going to do, but then I realized I was missing midst of the stuff that would make it work. My current plan only requires things I have.
So. Altoids tin, 555 timer pulsing a red LED (like a heart beat) when a contact stitch is open (as in the box is open) all powered on a AAA battery (or AA if it will fit).
To do:
Plan circuit
Fab battery holder and contact switch
Think of doing an anatomical heart cut out
Breadboard circuit
Solder circuit
Peter's stuff.