Help to save the environment. Learn the science of cleaning and reusing dirty water by conducting interesting water purification experiments. Build your own water filtration and desalination plant at your table top; disinfect water with solar power and more. It's a cool water science experimental kit. Includes filter sections, plugs and base, active carbon, sand, gravel, filter paper, funnel-shaped collector, plastic cup, soft wax, fishing line, and detailed instructions with fun facts.