Secret Agent Invisible Ink
Ages 3–9
Q-bo's Answer
Lemon juice turns brown when it gets hot, revealing your hidden secret!🍋🕵️
📖 Explanation
🧒 For Ages 3-5 (Simple Words)
Do you want to send a secret message? Write with lemon juice, and it disappears! Only your friends with a 'magic heater' can read it. It's for spies only!🤫
🎒 For Ages 6-9 (Science Talk)
Oxidation
Lemon juice contains carbon compounds. When you heat it, these compounds break down and release carbon, which turns brown when it reacts with the air. This is a type of oxidation.
❓ Frequently Asked Questions
- Can I use milk?
- Yes! Milk also works for invisible ink.
🧪 The Spy Message
~15 minWrite and reveal a secret note.
🛒 Supplies
📋 Steps
- 1
✍️ Write
Dip a cotton bud in lemon juice and write on paper.
- 2
💨 Dry
Let the paper dry completely.
- 3
🔥 Reveal
Hold it near a lightbulb or use an iron to see the words!
Watch the Video
「How to Make Your Signature Vanish Spy Science - Cool Science Experiment」— Check out cool science kits and toys: www.stevespanglerscien…
Secret Agent Invisible Ink