Nowadays we want simple objects and products that deliver us the direct satisfaction and service we need. For aesthetic reasons most of the inner workings of technology are hidden behind a shell or an interface, while there can be so much pleasure in seeing the working of a machine or device.
The Cuckoo clock is a well-known mechanism which is self-sufficient in creating its own energy. By pulling the weights connected to the system and giving the pendulum a small push, kinetic energy is translated into an electrical current. This can be used to charge small electrical devices like our phones or tablets.