Invisible ink
Write secret messages with homemade invisible ink! All you need is some basic kitchen items and lemon juice.
You'll need:
- Half a lemon
- Water
- Cotton bud
- Spoon
- Bowl
- Plain white paper
- Lamp or torch
Important tip
Make sure your kids aren't holding the paper too close to something too hot, as they might hurt themselves or burn the paper!
Instructions
-
1
Squeeze the lemon juice into a bowl and add a few drops of water.
-
2
Get your kids to mix the water and lemon juice together.
-
3
Dip your cotton bud into the juice. Write a message onto the white paper.
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4
Wait for the juice to dry so it’s totally invisible.
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5
When the paper is dry, carefully heat it by holding it close to a torch or a bulb, revealing your secret message!
So how’d that happen?
The lemon juice oxidises and turns brown when it's heated, so then you can read the message!
