Instructions

• 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)