Do plants need light? Investigate the importance of light to plants by growing and comparing plants in light and dark desktop greenhouses. Kit includes clear plastic cups with lids, black plastic cups, black electrical tape, black card stock, Jiffy 7 peat pellets, alfalfa seeds, white 5mm LED lights, and 3-volt coin cell batteries for a classroom of students working in groups of two. Order this kit online from agclassroomstore.com.