Secret Glowing Message with Invisible Ink

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Invisible ink is such a fun experiment as a kid. While most invisible inks you make at home are usually somewhat possible to see in regular light it still makes a fun activity for kids! This project would be really fun to use in a night time scavenger hunt as part of a birthday party, or part of a glow party activity line up!

Secret glowing message using invisible inkJust like the glowing hand experiment we did all you need is petroleum jelly and a UV blacklight. We used paper (thicker cardstock) but this works on the wall too (as long as you clean it up).

Write a message on the paper with the petroleum jelly using your fingers or a Qtip.

Secret glowing message using invisible inkGo into a dark room and see your message glow in the light of the blacklight!

Secret glowing message using invisible ink


We made you a video to show you how easy it is!

You can also make secret messages with milk or lemon juice using this method OR use a secret decoder! Another fun way is to write on a white sheet of paper with white crayon and then painting over it with water colors.

Secret glowing message using invisible ink

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Allison Waken is a wife, mom of boys and Phoenix, AZ native. She has been creating inspiring content for All for the Boys since 2011. Allison loves travel, movies and spending as much time as possible with her family while she can!

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