Make A Lemon Battery

 Lemon Cell 

Materials required are ~

1 - Led 

2 - Lemons 

3 - Zinc Nails 

4 - Copper Rod

 How to make ?

 1 - Put the zinc nail and copper rod inside the lemon.

 2 - Make sure that they didn't touch each other. 

 3 - Take the copper rod as the positive terminal and zinc rod as the negative   terminal. 

 4 - Join the terminals to bulb . 

 If your bulb doesn't glow then don't worry , make a series a the   lemon cells to increase the current THEN your bulb will start glowing .

How is it working ?

 - Lemon contains citric acid which participate in the electro-chemical reaction . So basically, when we connect a conductor across the TERMINALS of our cell the ions of zinc and copper starts moving and creates electricity due to a electro chemical reaction .