This zinc and copper sheets can be used for studying, teaching, learning, presentation, etc. Creative present for children to learn How to use fruits and to generate electricity. Intuitive experiment with interesting material help to stir students' interest in studying the physics and chemistry. Features -Color:Assorted Color -Material:Zinc, copper - Size: 4.00X1.30X0.10cm/1.57X0.51X0.04in -These metal strips can be used to build DIY fruit batteries, great for teaching, learning, presentations, and more -The metal strip set is a great tool to help motivate kids to learn about physics and chemistry. -Parents can carry out interesting fruit battery science experiments with their children. Cultivate children's interest in science learning -Simple and easy to use, improve the fun of the classroom, students' practical ability, and stimulate students' interest in learning. -Made of , craftsmanship makes them not easy to bend or break. Package list: 15 Sheets 15 x Zinc Sheets