Ok ot our school we have been having a big ipod problem where they are being stolin from peoples backpacks. i wanted to see if someone could make one that can fit in a ipod. i was thinking i would use the back (metle) as a conductor so when some one pickes it up it shuts down and it needs eather to stay constant or have intervals. but i dont know a circuit that will be that small and easy to make... any idias.

Good idia! but i should say it is not just ipods (but they are most common) but also some cell's. but this would be just for fun as well and if i can do it i can have fun while busting someone :P

Don't you have lockers?

And far as inside the ipod, good luck, I just change the battery in my sons. Not happen in there.