Once upon a time, I created this:
Complete with a working key:
I received a lot of requests to make a tutorial for it and I had started one, but a big move caused the parts and pieces to be thrown into boxes and hidden away for a long, long time. However, just the other day I was looking through some stuff and happened to find the pieces again! I was determined to finish the tutorial before Halloween came so hopefully some people could put it to use.
All glued up:
(Full write up here: http://www.chezlin.com/how-to-wind-up-key/)
Not pictured is how I attached it to myself for the night. I literally duct taped this thing onto myself for the whole night. I carefully taped the wind up mechanism part to a piece of cardboard to help stabilize it and then taped the cardboard onto the tank top I wore that night by wrapping the duct tape around my body a few times. It worked awesomely, the thing didn't budge, but it was a pain to get out of at the end of the night. If anyone else has any other ideas on how it could be attached, please let me know! My boyfriend's mom is going to use this one I just made, so we're trying to think of how we can get it on her without duct taping it onto her.