The Science Fair Kit is a great starter kit and an excellent science fair project. These deep water culture systems are durable and light weight. The 2' Science Fair Kit houses 4 plants. Each kit contains: Grow nutrient; air pump; tubing; air stone; pH kit; growing medium; 4 3" mesh pots; drainage assembly; self-contained reservoir; water level indicator; and complete instructions. Recommended in our Science Fair section. For only $3.00 extra we will send a packet of Bloom (high P) nutrient in addition to the Grow packet that comes with the kit, this is important if you plan to grow a flowering plant in the system. For more information on the kit call us Toll free at 1-888-305-4450.