Secret Agent Invisible Ink
Ages 3โ9
Key Insight
Lemon juice turns brown when it gets hot, revealing your hidden secret!๐๐ต๏ธ
๐ Explanation
๐ง 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!๐คซ
๐ 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.
โ Frequently Asked Questions
- Can I use milk?
- Yes! Milk also works for invisible ink.
๐งช The Spy Message
~15 minWrite and reveal a secret note.
๐ Supplies
๐ Steps
- 1
โ๏ธ Write
Dip a cotton bud in lemon juice and write on paper.
- 2
๐จ Dry
Let the paper dry completely.
- 3
๐ฅ Reveal
Hold it near a lightbulb or use an iron to see the words!
Watch the Video
ใKitchen Science Ep. 3: Secret Agent Invisible Ink - Making invisible ink in the Kitchen!ใโ Learn the science of how to make invisible ink using basic kโฆ
Secret Agent Invisible Ink
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