magnets

Despite some people’s distaste for three wheeled cars, they’re quite the popular model for concept cars right now. This is definitely one of the most unique eco-friendly concept vehicles we've seen to date. Though it may look a little like some kid's futuristic car, the MAG magnetic vehicle concept by Slovakian designer Matúš Procháczka goes in some interesting directions for possible future green power.

There has been much concern of late regarding the hazards presented by small magnets used in childrens toys

Scott F. Hall, an associate professor of art at the University of Central Florida, was tinkering around with stuff in his kitchen and came up with a continuously rotating mechanism that appears to harness electrostatic energy from the atmosphere — or something. The gizmo spins at around 80 revolutions per minute, and is constructed from a can of dog food, tooth picks, refrigerator magnets, a pencil, spring clips, and a small corner cut out of a box.