FRUIT POWER EXPERIMENT SUPPLIES: easy to use in scientific projects. Before operation, you need to prepare lemons, or some vegetables and beverages to assemble the battery METAL ELECTRODES: Improve children is ability to do things on their own, develop children is imagination and creativity ZINC ELECTRODE STRIPS: Through interesting fruit battery scientific experiments, parents can accompany your children to play and cultivate their science learning interest ELECTRODE STRIPS: Constructed using high- grade material, ensures it safety and can use it with confidence COPPER FLASHING: Use along with copper electrode strip and pin- type wires, to build your DIY fruit battery, Manufacturer: Jnchdghwa