How do I set up fruit, a battery and lightbulb to make the lightbulb light for Science fair?
First, roll all of the lemons, one at a time. Press down with your hand and roll until you feel the lemon become sort of “squishy.” The purpose of this is to release the juice inside the lemon. This step is very important; it helps you get the maximum response from your lemons. Push and then twist a zinc-plated screw into one of the lemons about 1/3 of the way from one end. With the knife, carefully cut a 1 cm (3/4 in) slit into the lemon about 1/3 of the way from the other end. CAUTION: It might be better for an adult to handle the knife. In all cases, please work with the knife SLOWLY and CAREFULLY. Insert a copper coin into the slit so that about half of the coin is inside the lemon. Note: Make sure you use a shiny new coin for this. If it is old and dull, polish it with steel wool. Believe it or not, you can now get electricity from the lemon!! It behaves like an electric cell, with the coin as the positive (+) terminal and the screw as the negative (-) terminal. Unfortunately, it
