LEARN HOW BATTERIES WORK – Build a battery with coins and learn how electricity and circuitry work in our detailed learning guide EASY TO FOLLOW INSTRUCTIONS – Our step-by-step instructions simply explain how to create your battery and recharge your coins EVERYTHING YOU NEED – This battery science kit is complete with everything you need, including a flashlight, coin compartment, steel coins, cardboard coins, copper coins, battery terminals, and a learning guide with instructions.