For our kinetic energy project (teamed up with Dorothy), we chose to make a faucet enabled water turbine, that when successfully operated from the force of the water, could generate enough power through a 3.7 V motor attached, to light a whole strip of LEDs.
Below is some of the documentation regarding experimentation, prototyping and finally execution (at least tried to):
We made some readings to determine the voltage that the motor could generate and if it was sustainable for the overall of the project:
Once the design was finished and we knew how we wanted to proceed with the actual fabrication, we 3D printed a water turbine and laser-cut some acrylic enclosures. We then fitted the gears and the motor (taken from an old VHS player).