Description 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 metal material, which is durable and useful. Features -Color:Assorted Color -Material:Metal -Size:17.00X3.00X0.50cm/6.68X1.18X0.20in -Note:One end of the red wire is connected to a zinc sheet and the other to a copper wire. For the electronic watch part, the blue wire is connected to the zinc sheet and the red wire to the copper sheet. - Made of metal material, not easy to damage, safe and durable, useful and interesting -DIY fruit battery potato clock science experiment kit, which will help your students developmental skills and learning minds - You can send it to your families and friends as a gift, they will be happyfor this creative and practical product - ExperimentDIY fruit battery potato clock, can make your students study science, fun learning, perfect for home and school use - Creative and educational DIY fruit battery kit, can help student to learnprinciple of fruit power generation,stimulate students' interest in learningPackage list: 8 x Zinc Plates 8 x Copper Plates 6 x Wires 2 x Electronic Watch Movement