Send a Secret Message: The Invisible Ink Science Experiment

Hello everybody! Let us again share with you one of our experiments. We love doing experiments together. It is really fun and we love to see amazing stuff happen.

The Invisible Ink

Do you want to send a secret message to your family and friends? Maybe you can try using the invisible ink.

What is invisible ink?

That's it, "invisible". People cannot see what you wrote when you use invisible ink. You can use lemon juice for this. Write your "secret message" using lemon juice and people won't see it... unless...

How do you reveal the message?

Okay, can you keep a secret? We will tell you, but promise not to use this to reveal our secret message. 😉

Here's the hint:

The acid on the lemon juice oxidizes and changes its color when you apply heat on it.

Get it?!

What's our secret message?

We made a secret message using the invisible ink. Can you guess what we made? Be sure to watch our video to find out.

Suggestions, please!

Can you help us with more experiment ideas? We'd love to hear your ideas so we can try them out too.

Music: www.bensound.com

Check out more of our experiment videos and follow us at 3speak.

• Travelling Water: Simple Kids Experiment
• Baking Soda and Vinegar Experiment
• Static Electricity

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