Bag Clip Shocker!
It actually looks like any generic freshness clip, but with 3 watch batteries, and lots of surface area to grab between the thumb and forefinger, it delivers a pretty good zap. I tried this on my son, (who should know better), he swore and threw the whole bag on the floor. I need to find some electric soap to wash his mouth out with.
These things are realistic, and it's a good way to find out who is sneaking a few of your Doritos at work.