Stepcylce Edit
Don't Pedal. Step, With the 3 G Stepper Bike

This is a whole new way to get around. Instead of pedalling, you simply step up and down, and with each step the bike moves forward. “Like most bicycles it operates by sprockets and a chain, but instead of pedals and a crank mechanism you’ll find a frame mounted lever style crank that has a skateboard-like platform mounted on top of it. Beneath is a standard sprocket with a rotating pin wheel that fits into a track on the underside of the aforementioned frame mounted lever.”