Used to demonstrate materials bio-degrading in testing media and liquids. The kit contains 6 specially designed containers, 6 clip frames, 6 open cage frames and 6 close cage frames to hold the materials in place. Includes T-sections of: 6x copper, 6x Aluminium, 6x Tin, 6x PLastic (Hot water soluble) and rapid degrading plastic film samples. Teaching notes are provided.