I've done a middle school career day a few times, but I slanted it toward robotics programming. One year I had a small robotic arm controlled by a computer. Another year I had a 120 lb. 5 foot tall robot from a first robotics competion that shot foam balls. The kids loved that. So I had pretty good interest. The other presenters where things like printer, pharmasist, artist and "golf course designer". I did another one for a college and I was talking about programming a digital archiving system using a tape robot, and had to follow a guy that worked on the space shuttle. Tough act to follow, but I still got some questions. Maybe if you slant it toward things like facebook, etc. Kids could make the connection. Brian