Do you want to have educational DIY fruit battery experiment to show for your students? This item will prepare for you, simple and convenient to use, can improve students' hands-on ability, and stimulate students' interest in learning, perfect for home, school use. It can exercise students practical ability. Features -Color:Multi -Material:Metal -Size:4.00X1.20X0.10cm/1.57X0.47X0.04in - An interactive and educational toy that allows children to engaging in hands-on scientific exploration. - Encourages children to explore the sciences world by conducting experiments, discovering easily in daily. - Stimulates children's curiosity and creativity as they engaging of process of creating and experimenting. - Helps children develop an understanding of electric current and voltage through process of electricity. - The good and creative gift for students, students will be happy for that and love it, very useful tool. Package list: 3 x wire 4 x zinc sheet 4 sheet