Superpower of Sleuthing
Experiment 4: Invisible Ink

Investigate the science of writing invisible secret messages.

Experiment 4 of theSuper Sleuthing superpower series - let's make a secret code revealing pen! Learn how to use the power repulsion with oil and water to make a pen that writes invisible messages that can be revealed only with a secret ingredient! Don't forget to download the full instructional worksheet and parent cheat sheet.

Download Student Worksheet
Download Parent Notes

Explore the Sleuthing Superpower Theme

Superpower of Sleuthing Trailer

A daring crime has been committed in Nanogirl's Lab!

Watch Trailer

Experiment 1 - Disguise

A cookie crime has been committed!

Watch Episode One

Experiment 2 - Cipher Wheel

Make a cipher wheel and send secret coded messages to your Super Friends!

Watch Episode Two

Experiment 3 - Chromatography

Detective Nanogirl is still on the trail of the cookie thief!

Watch Episode Three

Experiment 5 - Fingerprints

Nanogirl is closer than ever to solving the mystery of who stole the last cookie.

Watch Episode Five