What do you need to make magic ink?

To make magic ink, you'll typically need a few basic ingredients, such as lemon juice or vinegar, which serve as the invisible ink base. You can also add water to dilute the mixture if desired. For revealing the message, you'll need heat, like a light bulb or candle flame, which causes the ink to oxidize and become visible. Optional additions like baking soda or food coloring can enhance the effect or provide different colors.