I've got a "Certified Ethical Hacker" online course you can take. That should give you some interesting ideas, but probably get 1/2 the kids expelled the way things are anymore in school.

Actually, I also have the CompTIA A+ course on video too I can get you. Basically A+ is the "I'm an entry level computer guy" certification. Building systems, troubleshooting, etc. Give that a watch, and it should help you come up with ideas that would keep them interested. Send me a PM and I'll figure out how to get you the videos.