Mudwatt Classic Kit, Right or Left Handed: Fits Either Hand, track the growth of your electric bacteria colony with the blinker circuit and MudWatt Explorer App
Wind To Hydrogen Science Kit, Turn Wind Power Into Hydrogen Energy, Build Your Own Hydrogen Fuel Cell Powered Inventions, Revolutionary New Horizon Wind Turbine, Includes HorizonS Complete Curriculum On Renewable Energy On Cd, Demonstrate The Principles