The Food Alarm

We need one of these really bad.  Today's business idea would take quite a bit of development but would be very worth it in the end.  The alarm would work as follows.  A infrared sensor would track you children as they entered the kitchen area.  All the shelves you keep food on would have a weight sensor.  If a child took something from those shelves, thus lowering the weight of that shelf, and then left the kitchen area, tracked by the infrared, the alarm would go off.  This would alert parents that a small infrared heat source had lowered the weight of a food shelf and then left the kitchen area too quickly to have eaten that object.  This would be great since my 3 year old snuck chocolate chips upstairs yesterday in his sticky little hand.