For my Mr. Freeze from Arkhym City I want controls.  There are lights that light up, there is a face mask that goes up and down.  And I want sound effects. So my first plan is a bluetooth keyboard on my forearm,  and that talks to a bluetooth shield on a arduino controller.  So here is a bread board prototype working with a adafruit bluetooth keyboard.  The adafruit controller is super simple,  super easy to work with. I have gotten a successfull 3 hours of continuos control of a 1/3 N cell battery.  Not bad, I would like 12 hours.  I had some spare 1/3 N cell batteries and a socket for it.  I think I may need AA's or maybe AAA's.  I want to keep it small.