Made of high grade material, which is durable, no easy to deformation, funny and wonderful. DIY fruit battery kit greatly exercising kids' varieties of abilities, stimulate children's interest in learning and curiosity, which is easy to assemble, greatly improve children's hands-on ability, improve classroom interest. Features -Color:Assorted Color -Material:Metal -Size:23.00X0.20X0.20cm/9.04X0.08X0.08in (Wire) -Size:4.00X1.20X0.10cm/1.57X0.47X0.04in (Copper Sheet) -Size:2.80X2.80X0.30cm/1.10X1.10X0.12in (Electronic clock) - Made of , not easy to damage, and durable, useful and interesting. - DIY fruit battery potato clock science experiment kit, which will help your child's developmental skills and learning minds. - You can send it to your families and friends as a gift, they will be happy for this creative and practical product. - Experiment DIY fruit battery potato clock, can make your kid study science, fun learning, perfect for home and school use. - Creative and educational DIY fruit battery kit, can help student to learn principle of generation, stimulate students' interest in learning. Package list: 1 × Set of Fruit Battery Science Experiment Kit