From the designer:

“I was looking for opportunities to generate energy through activities we naturally do. The final result is a rocking chair that enables the user to experience the production and consumption of electricity in a gentle and rewarding way. An abstract process becomes tangible and eventually cultivates natural awareness. Complexity is covered by simplicity. Advanced nano-dynamo technology which is built into the skids of the chair and more efficient light sources such as the newly developed OLED generation makes it possible to build a rocking chair with a reading lamp running on electricity generated from the rocking motion. During daylight the energy gets stored in a battery pack.”

Ingenious.