IPOD game limit timer app

I think this goes here.



Despite my protests, my wife let our 10 year old son by an IPOD (touch, 4th gen) with is own money.



I'm afraid the little bugger is going to be up all night shooting a Chewbacca Bird at a StormPig.



I've been looking for a good timer, ya know, something along the lines of:

I set it for 1 hour and he has 1 hour worth of play time, when the hour is up, he needs a password to unlock it - at which point he comes to see me!



I'm sure you see where I'm going, or at least trying to go.



I've found two on Itunes, and neither seem to be worth their virtual weight in virtual salt.



So...to quote King Arthur, any help would be....uh....helpful.

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