It is DIY fruit battery potato clock science experiment kit, it can exercise your students practical ability, train your students observation capability, thinking and analytical skills. Bright colors will appeal to students and let them learn with fun and enjoyment. It is made of zinc, copper material, which is durable and useful. Features -Color:Multi -Material:Zinc, copper -Size:4.00X0.80X0.10cm/1.57X0.31X0.04in - Made of zinc, copper material, safe and reusable, it is not easy to damage students due to leakage. - Complete the fruit battery science experiment project with the students to let the students experience the mysteries of science. - Cultivate students imagination and hands-on ability, and make students more interested in science experiments. - By completing the fruit battery science experiment project with the students, enhancing feelings. - It can also improve students hands-on ability, increase scientific knowledge, and cultivate a hobby of scientific invention. Package list: 4 x Zinc Plates 4x Copper Plates 3 x Wires 2 x lamp beads 1 x leadwire