kit4curious salt water battery diy science experiment complete kit with instruction manual- Multi color

About this item

• Salt water battery DIY kit for school project, Science experiment, Free energy device, Hobby project
• Use ‘salt + water’ to glow LED or to produce buzz sound
• 4 Big size copper plate, 4 big size Zinc plate, 5 wire, 5 LEDs, 1 Sound buzzer, Instruction manual