Explore wind-energy conversion and blade rotation, then design blades, shaft, and support for a working model.

Explore how flowing water turns paddles, then design the wheel, axle, and frame for a continuously rotating power model.

Study how water drives a rotor and shaft, then optimize blade angle, wheel, and frame in an energy-conversion device.

Explore solar-energy capture and conversion, then design light collection, power transfer, and a working application.

Investigate waste sorting, then design recognition, compartments, opening, or feedback for a smart recycling device.

Explore rainwater use and sustainability, then design a collection system that clearly demonstrates its function.

Explore sustainable living and energy principles, then design an eco-home model that demonstrates practical solutions.