Age Group: K-5th grade

Total time: 20 minutes

Supplies

• Lemon | 1

• Bowl | 1

• Cotton Swab | 1

• Sheet of Paper | 1

• Heat Source (Lamp or Stove) | 1

Directions

1. Squeeze the lemon juice into a bowl.

2. Dip the cotton swab into the lemon juice.

3. Draw or write a secret message on the paper using the cotton swab with the lemon juice as “ink.”

4. Wait for the lemon juice to dry.

5. Heat the paper by holding it close to a heat source, such as a lamp, and wait for the message to appear.