- Step 1: Put lemon juice in bowl Put the lemon juice in a bowl and dip your cotton swab in the lemon juice.
- TIP: Using milk, vinegar, or orange juice instead of lemon juice will have the same effect.
- Step 2: Write your message Write your secret message on the paper with your cotton swab and let the writing dry completely. The message will be invisible when the message dries.
- TIP: You can use a paintbrush or a toothpick instead of a cotton swab.
- Step 3: Heat the paper Hold the paper near the light bulb to expose it to the heat, but don’t rest the paper on the bulb.
- Step 4: Message appears Watch in amazement as the message magically appears. The words will appear in a tan or brown color.
- FACT: Did you know? Arizona and California produce 95 percent of the U.S. lemon crop.
You Will Need
- Lemon juice
- A bowl
- A cotton swab
- White paper
- A light source with a 100-watt light bulb
- Milk (optional)
- Vinegar (optional)
- Orange juice (optional)
- Paintbrush (optional)
- Toothpick (optional)