How do you make invisible ink and see it with grape juice?

To create invisible ink using lemon juice and reveal the message with grape juice, follow these steps:

Creating the Invisible Ink:

1. Squeeze the lemon juice into a small container.

2. Use a cotton swab or a small paintbrush to write a message or draw an image on a piece of white paper.

3. Let the lemon juice dry completely. The writing should become invisible.

Revealing the Message:

1. Squeeze some grape juice into a separate container.

2. Dip a cotton swab or a small brush into the grape juice.

3. Gently brush the grape juice over the invisible writing.

4. As the grape juice reacts with the lemon juice, the writing should start to appear. The grape juice will act as a developer and make the invisible ink visible again.

Remember, the grape juice might stain the paper, so it is best to use low-quality paper for this project. Additionally, the invisible ink message might not be very long-lasting, as the reaction fades over time. The secret message will likely be visible for a few minutes to an hour, depending on the concentration of the grape juice.