If you like to tinker — as most of us web developers like to do — check out this collection of electronic craft projects.
Our favorite is the Power Cart; a combination of solar power and crank power assembled into a box on strapped onto a dolly. The idea is to provide a portable power source to battery-drained street walkers.
I think I like the idea of the Pillow Music better. Nice soothing music to lull me to sleep.
PotentMind.com