We often see students, especially school going, moving their body to and fro on the chair while cramming their lessons in the classroom or at home. It may irritate few sitting alongside, but designer Petr Novak has transformed the basic human instinct into a natural source of energy. The designer has developed a rocking chair, claimed the ‘Rocking shell Chair,’ with an incorporated LED lamp that harnesses useful energy with the movement of the chair. The rocking chair features a special kinematic mechanism, like a steam engine, to power the LED lamp with a lever that runs a flywheel disk beneath the seat while rocking forward or backward. The rocking chair is just an awesome idea to harness the sustainable energy.