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Spy Camp

Invisible Ink Message!

Soleil Kohl

This class is part of Beanstalk's Spy Camp - an awesome week filled with crafts, music, movement, and adventure! Signing up for this class will automatically register you for all camp classes, but you can attend just the classes you want.

How can we write a message that stays invisible before it arrives? Let's try making our own invisible ink two different ways to see what works best!

Materials Needed

Small dish or bowl


Cotton swabs

Baking soda


Lemon juice

Grape juice

Lamp or heat source