Making a lemon battery is very easy. Lemon contains citric acid and with the help of citric acid two different metals can generate electricity. You will need lemon, copper coin, zinc coated nail, crocodile clip, multimeter and a LED to make battery. It can be a science fair project also. So watch this hilaroad video how you can make battery at your kitchen.
You may also like:
Van Allen radiation belts
How seismic wave and cold war era technology helping nuclear disarmament around the globe
Sea salt and Table salt
Washing hair in space
Why do we put salt on icy road instead of heating?
NOT gate or inverter
Bicycle, most energy efficient method of transportation
De Broglie Hypothesis
Carbon dioxide is heavier than air
How ATM works