Explore wind, solar, and water energy—all in one convenient set! Three interchangeable power units can be mounted to a sturdy plastic base. One converts sunlight to energy, while the other two use wind and water to create energy. Four different monitors can also be connected to the base. These monitors make a sound, flash a light, turn gears or measure voltage so students can observe and measure the energy produced. High-impact plastic base is 7" x 10" with a maximum height of 20", monitors are 3" in diameter and kit includes 20 feet of clear plastic tubing for the water module. Also includes a packet with suggested activities and instructions.