Here's a pretty cool project to teach high school kids about solar power, magnetism, and putting together something that is somewhat on the more difficult side. The Mendocino Motor is solar powered, and is making an appearance at this year's Bay Area Maker Faire. Check out the video on how it works. The Mendocino Motor is apparently easy to get right, but tough to put together if you aren't very skilled at soldering. It's a great project for kids (and adults!) to get them exposed to solar power and the potential it holds for any number of uses.
This is one of many very cool projects that will be at the Maker Faire this coming weekend in the Bay Area.
More Cool DIY Solar Projects
Make Your Own Solar Box Cooker
How to Make Inexpensive DIY Home-Built Solar Panels with Damaged Solar Cells from Ebay
DIY Passive Solar Heat for Your Garage
Make Your Own Solar Cell Phone Charger