Can you do something with robots? If you can show kids how putting in this command makes the robot drive forward/turn/etc they will think that is pretty cool.

And how many of you died from the pencil-flinging?

I sincerely hope you are on the Basil Marceaux bandwagon. http://www.youtube.com/watch?v=aOlM1pPMNBc

And then hey...its working so well tracking criminals, why don't we just track all the citizens? You never know when you'll need to prove a yet-to-be-established criminal commits a crime....